From ba1bbfd7f45887abae15e17138ababcea5c2837a Mon Sep 17 00:00:00 2001
From: Jason Nelson <jason@carbonmade.com>
Date: Tue, 3 Jul 2018 10:00:55 -0700
Subject: [PATCH] Pass by reference

---
 .../Conversion/ColorSpaceConverter.Adapt.cs   | 16 ++++++------
 .../Conversion/ColorSpaceConverter.CieLab.cs  | 26 +++++++++----------
 .../Conversion/ColorSpaceConverter.CieLch.cs  | 26 +++++++++----------
 .../ColorSpaceConverter.CieLchuv.cs           | 24 ++++++++---------
 .../Conversion/ColorSpaceConverter.CieLuv.cs  | 26 +++++++++----------
 .../Conversion/ColorSpaceConverter.CieXyy.cs  | 24 ++++++++---------
 .../Conversion/ColorSpaceConverter.CieXyz.cs  | 26 +++++++++----------
 .../Conversion/ColorSpaceConverter.Cmyk.cs    | 26 +++++++++----------
 .../Conversion/ColorSpaceConverter.Hsl.cs     | 24 ++++++++---------
 .../Conversion/ColorSpaceConverter.Hsv.cs     | 24 ++++++++---------
 .../ColorSpaceConverter.HunterLab.cs          | 26 +++++++++----------
 .../ColorSpaceConverter.LinearRgb.cs          | 26 +++++++++----------
 .../Conversion/ColorSpaceConverter.Lms.cs     | 26 +++++++++----------
 .../Conversion/ColorSpaceConverter.Rgb.cs     | 26 +++++++++----------
 .../Conversion/ColorSpaceConverter.YCbCr.cs   | 26 +++++++++----------
 15 files changed, 186 insertions(+), 186 deletions(-)

diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Adapt.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Adapt.cs
index 4bb537aeb..e2c1308fa 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Adapt.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Adapt.cs
@@ -18,7 +18,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// <param name="color">The color to adapt</param>
         /// <param name="sourceWhitePoint">The white point to adapt for</param>
         /// <returns>The adapted color</returns>
-        public CieXyz Adapt(CieXyz color, CieXyz sourceWhitePoint)
+        public CieXyz Adapt(in CieXyz color, in CieXyz sourceWhitePoint)
         {
             if (!this.IsChromaticAdaptationPerformed)
             {
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to adapt</param>
         /// <returns>The adapted color</returns>
-        public CieLab Adapt(CieLab color)
+        public CieLab Adapt(in CieLab color)
         {
             if (!this.IsChromaticAdaptationPerformed)
             {
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to adapt</param>
         /// <returns>The adapted color</returns>
-        public CieLch Adapt(CieLch color)
+        public CieLch Adapt(in CieLch color)
         {
             if (!this.IsChromaticAdaptationPerformed)
             {
@@ -75,7 +75,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to adapt</param>
         /// <returns>The adapted color</returns>
-        public CieLchuv Adapt(CieLchuv color)
+        public CieLchuv Adapt(in CieLchuv color)
         {
             if (!this.IsChromaticAdaptationPerformed)
             {
@@ -96,7 +96,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to adapt</param>
         /// <returns>The adapted color</returns>
-        public CieLuv Adapt(CieLuv color)
+        public CieLuv Adapt(in CieLuv color)
         {
             if (!this.IsChromaticAdaptationPerformed)
             {
@@ -117,7 +117,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to adapt</param>
         /// <returns>The adapted color</returns>
-        public HunterLab Adapt(HunterLab color)
+        public HunterLab Adapt(in HunterLab color)
         {
             if (!this.IsChromaticAdaptationPerformed)
             {
@@ -138,7 +138,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to adapt</param>
         /// <returns>The adapted color</returns>
-        public LinearRgb Adapt(LinearRgb color)
+        public LinearRgb Adapt(in LinearRgb color)
         {
             if (!this.IsChromaticAdaptationPerformed)
             {
@@ -167,7 +167,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to adapt</param>
         /// <returns>The adapted color</returns>
-        public Rgb Adapt(Rgb color)
+        public Rgb Adapt(in Rgb color)
         {
             LinearRgb linearInput = this.ToLinearRgb(color);
             LinearRgb linearOutput = this.Adapt(linearInput);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLab.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLab.cs
index 16e3ec707..1cead3001 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLab.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLab.cs
@@ -21,7 +21,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(CieLch color)
+        public CieLab ToCieLab(in CieLch color)
         {
             // Conversion (perserving white point)
             CieLab unadapted = CieLchToCieLabConverter.Convert(color);
@@ -40,7 +40,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(CieLchuv color)
+        public CieLab ToCieLab(in CieLchuv color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
@@ -51,7 +51,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(CieLuv color)
+        public CieLab ToCieLab(in CieLuv color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
@@ -62,7 +62,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(CieXyy color)
+        public CieLab ToCieLab(in CieXyy color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
@@ -73,7 +73,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(CieXyz color)
+        public CieLab ToCieLab(in CieXyz color)
         {
             // Adaptation
             CieXyz adapted = !this.WhitePoint.Equals(this.TargetLabWhitePoint) && this.IsChromaticAdaptationPerformed
@@ -90,7 +90,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(Cmyk color)
+        public CieLab ToCieLab(in Cmyk color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
@@ -101,7 +101,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(Hsl color)
+        public CieLab ToCieLab(in Hsl color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
@@ -112,7 +112,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(Hsv color)
+        public CieLab ToCieLab(in Hsv color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
@@ -123,7 +123,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(HunterLab color)
+        public CieLab ToCieLab(in HunterLab color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
@@ -134,7 +134,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(Lms color)
+        public CieLab ToCieLab(in Lms color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
@@ -145,7 +145,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(LinearRgb color)
+        public CieLab ToCieLab(in LinearRgb color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
@@ -156,7 +156,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(Rgb color)
+        public CieLab ToCieLab(in Rgb color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
@@ -167,7 +167,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLab ToCieLab(YCbCr color)
+        public CieLab ToCieLab(in YCbCr color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLab(xyzColor);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs
index b13580209..cbefc5ac5 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLch.cs
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(CieLab color)
+        public CieLch ToCieLch(in CieLab color)
         {
             // Adaptation
             CieLab adapted = this.IsChromaticAdaptationPerformed ? this.Adapt(color) : color;
@@ -34,7 +34,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(CieLchuv color)
+        public CieLch ToCieLch(in CieLchuv color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
@@ -45,7 +45,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(CieLuv color)
+        public CieLch ToCieLch(in CieLuv color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
@@ -56,7 +56,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(CieXyy color)
+        public CieLch ToCieLch(in CieXyy color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
@@ -67,7 +67,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(CieXyz color)
+        public CieLch ToCieLch(in CieXyz color)
         {
             CieLab labColor = this.ToCieLab(color);
             return this.ToCieLch(labColor);
@@ -78,7 +78,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(Cmyk color)
+        public CieLch ToCieLch(in Cmyk color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
@@ -89,7 +89,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(Hsl color)
+        public CieLch ToCieLch(in Hsl color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
@@ -100,7 +100,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(Hsv color)
+        public CieLch ToCieLch(in Hsv color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
@@ -111,7 +111,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(HunterLab color)
+        public CieLch ToCieLch(in HunterLab color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
@@ -122,7 +122,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(LinearRgb color)
+        public CieLch ToCieLch(in LinearRgb color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
@@ -133,7 +133,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(Lms color)
+        public CieLch ToCieLch(in Lms color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
@@ -144,7 +144,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(Rgb color)
+        public CieLch ToCieLch(in Rgb color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
@@ -155,7 +155,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLch"/></returns>
-        public CieLch ToCieLch(YCbCr color)
+        public CieLch ToCieLch(in YCbCr color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLch(xyzColor);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLchuv.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLchuv.cs
index a5b5220b9..a44541bdb 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLchuv.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLchuv.cs
@@ -20,7 +20,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(CieLab color)
+        public CieLchuv ToCieLchuv(in CieLab color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLchuv(xyzColor);
@@ -31,7 +31,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(CieLch color)
+        public CieLchuv ToCieLchuv(in CieLch color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLchuv(xyzColor);
@@ -42,7 +42,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(CieLuv color)
+        public CieLchuv ToCieLchuv(in CieLuv color)
         {
             // Adaptation
             CieLuv adapted = this.IsChromaticAdaptationPerformed ? this.Adapt(color) : color;
@@ -56,7 +56,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(CieXyy color)
+        public CieLchuv ToCieLchuv(in CieXyy color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLchuv(xyzColor);
@@ -67,7 +67,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(CieXyz color)
+        public CieLchuv ToCieLchuv(in CieXyz color)
         {
             CieLab labColor = this.ToCieLab(color);
             return this.ToCieLchuv(labColor);
@@ -78,7 +78,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(Cmyk color)
+        public CieLchuv ToCieLchuv(in Cmyk color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLchuv(xyzColor);
@@ -89,7 +89,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(Hsl color)
+        public CieLchuv ToCieLchuv(in Hsl color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLchuv(xyzColor);
@@ -100,7 +100,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(Hsv color)
+        public CieLchuv ToCieLchuv(in Hsv color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLchuv(xyzColor);
@@ -111,7 +111,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(HunterLab color)
+        public CieLchuv ToCieLchuv(in HunterLab color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLchuv(xyzColor);
@@ -122,7 +122,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(LinearRgb color)
+        public CieLchuv ToCieLchuv(in LinearRgb color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLchuv(xyzColor);
@@ -133,7 +133,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(Lms color)
+        public CieLchuv ToCieLchuv(in Lms color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLchuv(xyzColor);
@@ -155,7 +155,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLchuv"/></returns>
-        public CieLchuv ToCieLchuv(YCbCr color)
+        public CieLchuv ToCieLchuv(in YCbCr color)
         {
             CieXyz xyzColor = this.ToCieXyz(color);
             return this.ToCieLchuv(xyzColor);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLuv.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLuv.cs
index 7260a818f..36e6501a5 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLuv.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieLuv.cs
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(CieLab color)
+        public CieLuv ToCieLuv(in CieLab color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(CieLch color)
+        public CieLuv ToCieLuv(in CieLch color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLab"/></returns>
-        public CieLuv ToCieLuv(CieLchuv color)
+        public CieLuv ToCieLuv(in CieLchuv color)
         {
             // Conversion (perserving white point)
             CieLuv unadapted = CieLchuvToCieLuvConverter.Convert(color);
@@ -60,7 +60,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(CieXyy color)
+        public CieLuv ToCieLuv(in CieXyy color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
@@ -71,7 +71,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(CieXyz color)
+        public CieLuv ToCieLuv(in CieXyz color)
         {
             // Adaptation
             CieXyz adapted = !this.WhitePoint.Equals(this.TargetLabWhitePoint) && this.IsChromaticAdaptationPerformed
@@ -88,7 +88,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(Cmyk color)
+        public CieLuv ToCieLuv(in Cmyk color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
@@ -99,7 +99,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(Hsl color)
+        public CieLuv ToCieLuv(in Hsl color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
@@ -110,7 +110,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(Hsv color)
+        public CieLuv ToCieLuv(in Hsv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
@@ -121,7 +121,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(HunterLab color)
+        public CieLuv ToCieLuv(in HunterLab color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
@@ -132,7 +132,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(Lms color)
+        public CieLuv ToCieLuv(in Lms color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
@@ -143,7 +143,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(LinearRgb color)
+        public CieLuv ToCieLuv(in LinearRgb color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
@@ -154,7 +154,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(Rgb color)
+        public CieLuv ToCieLuv(in Rgb color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
@@ -165,7 +165,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieLuv"/></returns>
-        public CieLuv ToCieLuv(YCbCr color)
+        public CieLuv ToCieLuv(in YCbCr color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToCieLuv(xyzColor);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyy.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyy.cs
index 5f6aaea6b..25a9f75a4 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyy.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyy.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(CieLab color)
+        public CieXyy ToCieXyy(in CieLab color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(CieLch color)
+        public CieXyy ToCieXyy(in CieLch color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(CieLchuv color)
+        public CieXyy ToCieXyy(in CieLchuv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -53,7 +53,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(CieLuv color)
+        public CieXyy ToCieXyy(in CieLuv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -65,7 +65,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(CieXyz color)
+        public CieXyy ToCieXyy(in CieXyz color)
         {
             return CieXyzAndCieXyyConverter.Convert(color);
         }
@@ -75,7 +75,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(Cmyk color)
+        public CieXyy ToCieXyy(in Cmyk color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -99,7 +99,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(Hsv color)
+        public CieXyy ToCieXyy(in Hsv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -111,7 +111,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(HunterLab color)
+        public CieXyy ToCieXyy(in HunterLab color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -123,7 +123,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(LinearRgb color)
+        public CieXyy ToCieXyy(in LinearRgb color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -135,7 +135,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(Lms color)
+        public CieXyy ToCieXyy(in Lms color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -147,7 +147,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(Rgb color)
+        public CieXyy ToCieXyy(in Rgb color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -159,7 +159,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyy"/></returns>
-        public CieXyy ToCieXyy(YCbCr color)
+        public CieXyy ToCieXyy(in YCbCr color)
         {
             var xyzColor = this.ToCieXyz(color);
 
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
index cd3f7f3c8..ff3822c86 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
@@ -26,7 +26,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(CieLab color)
+        public CieXyz ToCieXyz(in CieLab color)
         {
             // Conversion
             CieXyz unadapted = CieLabToCieXyzConverter.Convert(color);
@@ -44,7 +44,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(CieLch color)
+        public CieXyz ToCieXyz(in CieLch color)
         {
             // Conversion to Lab
             CieLab labColor = CieLchToCieLabConverter.Convert(color);
@@ -58,7 +58,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(CieLchuv color)
+        public CieXyz ToCieXyz(in CieLchuv color)
         {
             // Conversion to Luv
             CieLuv luvColor = CieLchuvToCieLuvConverter.Convert(color);
@@ -72,7 +72,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(CieLuv color)
+        public CieXyz ToCieXyz(in CieLuv color)
         {
             // Conversion
             CieXyz unadapted = CieLuvToCieXyzConverter.Convert(color);
@@ -90,7 +90,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(CieXyy color)
+        public CieXyz ToCieXyz(in CieXyy color)
         {
             // Conversion
             return CieXyzAndCieXyyConverter.Convert(color);
@@ -101,7 +101,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(Cmyk color)
+        public CieXyz ToCieXyz(in Cmyk color)
         {
             // Conversion
             var rgb = this.ToRgb(color);
@@ -114,7 +114,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(Hsl color)
+        public CieXyz ToCieXyz(in Hsl color)
         {
             // Conversion
             var rgb = this.ToRgb(color);
@@ -127,7 +127,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(Hsv color)
+        public CieXyz ToCieXyz(in Hsv color)
         {
             // Conversion
             var rgb = this.ToRgb(color);
@@ -140,7 +140,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(HunterLab color)
+        public CieXyz ToCieXyz(in HunterLab color)
         {
             // Conversion
             CieXyz unadapted = HunterLabToCieXyzConverter.Convert(color);
@@ -158,7 +158,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(LinearRgb color)
+        public CieXyz ToCieXyz(in LinearRgb color)
         {
             // Conversion
             LinearRgbToCieXyzConverter converter = this.GetLinearRgbToCieXyzConverter(color.WorkingSpace);
@@ -175,7 +175,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(Lms color)
+        public CieXyz ToCieXyz(in Lms color)
         {
             // Conversion
             return this.cachedCieXyzAndLmsConverter.Convert(color);
@@ -186,7 +186,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(Rgb color)
+        public CieXyz ToCieXyz(in Rgb color)
         {
             // Conversion
             LinearRgb linear = RgbToLinearRgbConverter.Convert(color);
@@ -198,7 +198,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="CieXyz"/></returns>
-        public CieXyz ToCieXyz(YCbCr color)
+        public CieXyz ToCieXyz(in YCbCr color)
         {
             // Conversion
             var rgb = this.ToRgb(color);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Cmyk.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Cmyk.cs
index 708c2eac0..1e403828a 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Cmyk.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Cmyk.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(CieLab color)
+        public Cmyk ToCmyk(in CieLab color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(CieLch color)
+        public Cmyk ToCmyk(in CieLch color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(CieLchuv color)
+        public Cmyk ToCmyk(in CieLchuv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -53,7 +53,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(CieLuv color)
+        public Cmyk ToCmyk(in CieLuv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -65,7 +65,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(CieXyy color)
+        public Cmyk ToCmyk(in CieXyy color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -77,7 +77,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(CieXyz color)
+        public Cmyk ToCmyk(in CieXyz color)
         {
             var rgb = this.ToRgb(color);
 
@@ -89,7 +89,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(Hsl color)
+        public Cmyk ToCmyk(in Hsl color)
         {
             var rgb = this.ToRgb(color);
 
@@ -101,7 +101,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(Hsv color)
+        public Cmyk ToCmyk(in Hsv color)
         {
             var rgb = this.ToRgb(color);
 
@@ -113,7 +113,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(HunterLab color)
+        public Cmyk ToCmyk(in HunterLab color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -125,7 +125,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(LinearRgb color)
+        public Cmyk ToCmyk(in LinearRgb color)
         {
             var rgb = this.ToRgb(color);
 
@@ -137,7 +137,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(Lms color)
+        public Cmyk ToCmyk(in Lms color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -149,7 +149,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(Rgb color)
+        public Cmyk ToCmyk(in Rgb color)
         {
             return CmykAndRgbConverter.Convert(color);
         }
@@ -159,7 +159,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Cmyk"/></returns>
-        public Cmyk ToCmyk(YCbCr color)
+        public Cmyk ToCmyk(in YCbCr color)
         {
             var rgb = this.ToRgb(color);
 
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsl.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsl.cs
index 909658a06..78f8c36fb 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsl.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsl.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(CieLab color)
+        public Hsl ToHsl(in CieLab color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(CieLch color)
+        public Hsl ToHsl(in CieLch color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(CieLchuv color)
+        public Hsl ToHsl(in CieLchuv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -53,7 +53,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(CieLuv color)
+        public Hsl ToHsl(in CieLuv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -65,7 +65,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(CieXyy color)
+        public Hsl ToHsl(in CieXyy color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -77,7 +77,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(CieXyz color)
+        public Hsl ToHsl(in CieXyz color)
         {
             var rgb = this.ToRgb(color);
 
@@ -89,7 +89,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(Cmyk color)
+        public Hsl ToHsl(in Cmyk color)
         {
             var rgb = this.ToRgb(color);
 
@@ -101,7 +101,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(Hsv color)
+        public Hsl ToHsl(in Hsv color)
         {
             var rgb = this.ToRgb(color);
 
@@ -113,7 +113,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(HunterLab color)
+        public Hsl ToHsl(in HunterLab color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -125,7 +125,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(LinearRgb color)
+        public Hsl ToHsl(in LinearRgb color)
         {
             var rgb = this.ToRgb(color);
 
@@ -149,7 +149,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(Rgb color)
+        public Hsl ToHsl(in Rgb color)
         {
             return HslAndRgbConverter.Convert(color);
         }
@@ -159,7 +159,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsl"/></returns>
-        public Hsl ToHsl(YCbCr color)
+        public Hsl ToHsl(in YCbCr color)
         {
             var rgb = this.ToRgb(color);
 
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsv.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsv.cs
index 0aa644567..3edd72c59 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsv.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Hsv.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(CieLab color)
+        public Hsv ToHsv(in CieLab color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(CieLch color)
+        public Hsv ToHsv(in CieLch color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(CieLchuv color)
+        public Hsv ToHsv(in CieLchuv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -53,7 +53,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(CieLuv color)
+        public Hsv ToHsv(in CieLuv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -65,7 +65,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(CieXyy color)
+        public Hsv ToHsv(in CieXyy color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -77,7 +77,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(CieXyz color)
+        public Hsv ToHsv(in CieXyz color)
         {
             var rgb = this.ToRgb(color);
 
@@ -89,7 +89,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(Cmyk color)
+        public Hsv ToHsv(in Cmyk color)
         {
             var rgb = this.ToRgb(color);
 
@@ -101,7 +101,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(Hsl color)
+        public Hsv ToHsv(in Hsl color)
         {
             var rgb = this.ToRgb(color);
 
@@ -113,7 +113,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(HunterLab color)
+        public Hsv ToHsv(in HunterLab color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -125,7 +125,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(LinearRgb color)
+        public Hsv ToHsv(in LinearRgb color)
         {
             var rgb = this.ToRgb(color);
 
@@ -149,7 +149,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(Rgb color)
+        public Hsv ToHsv(in Rgb color)
         {
             return HsvAndRgbConverter.Convert(color);
         }
@@ -159,7 +159,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Hsv"/></returns>
-        public Hsv ToHsv(YCbCr color)
+        public Hsv ToHsv(in YCbCr color)
         {
             var rgb = this.ToRgb(color);
 
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.HunterLab.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.HunterLab.cs
index 880a91551..f3a64164b 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.HunterLab.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.HunterLab.cs
@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(CieLab color)
+        public HunterLab ToHunterLab(in CieLab color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -26,7 +26,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(CieLch color)
+        public HunterLab ToHunterLab(in CieLch color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -37,7 +37,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(CieLchuv color)
+        public HunterLab ToHunterLab(in CieLchuv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -48,7 +48,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(CieLuv color)
+        public HunterLab ToHunterLab(in CieLuv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -59,7 +59,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(CieXyy color)
+        public HunterLab ToHunterLab(in CieXyy color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -70,7 +70,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(CieXyz color)
+        public HunterLab ToHunterLab(in CieXyz color)
         {
             // Adaptation
             CieXyz adapted = !this.WhitePoint.Equals(this.TargetHunterLabWhitePoint) && this.IsChromaticAdaptationPerformed
@@ -86,7 +86,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(Cmyk color)
+        public HunterLab ToHunterLab(in Cmyk color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -97,7 +97,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(Hsl color)
+        public HunterLab ToHunterLab(in Hsl color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -108,7 +108,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(Hsv color)
+        public HunterLab ToHunterLab(in Hsv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -119,7 +119,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(LinearRgb color)
+        public HunterLab ToHunterLab(in LinearRgb color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -130,7 +130,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(Lms color)
+        public HunterLab ToHunterLab(in Lms color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -141,7 +141,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(Rgb color)
+        public HunterLab ToHunterLab(in Rgb color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
@@ -152,7 +152,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="HunterLab"/></returns>
-        public HunterLab ToHunterLab(YCbCr color)
+        public HunterLab ToHunterLab(in YCbCr color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToHunterLab(xyzColor);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs
index 92d2cd861..6cfdb4853 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs
@@ -19,7 +19,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(CieLab color)
+        public LinearRgb ToLinearRgb(in CieLab color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLinearRgb(xyzColor);
@@ -30,7 +30,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(CieLch color)
+        public LinearRgb ToLinearRgb(in CieLch color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLinearRgb(xyzColor);
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(CieLchuv color)
+        public LinearRgb ToLinearRgb(in CieLchuv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLinearRgb(xyzColor);
@@ -52,7 +52,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(CieLuv color)
+        public LinearRgb ToLinearRgb(in CieLuv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLinearRgb(xyzColor);
@@ -63,7 +63,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(CieXyy color)
+        public LinearRgb ToLinearRgb(in CieXyy color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLinearRgb(xyzColor);
@@ -74,7 +74,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(CieXyz color)
+        public LinearRgb ToLinearRgb(in CieXyz color)
         {
             // Adaptation
             CieXyz adapted = this.TargetRgbWorkingSpace.WhitePoint.Equals(this.WhitePoint) || !this.IsChromaticAdaptationPerformed
@@ -91,7 +91,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(Cmyk color)
+        public LinearRgb ToLinearRgb(in Cmyk color)
         {
             var rgb = this.ToRgb(color);
             return this.ToLinearRgb(rgb);
@@ -102,7 +102,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(Hsl color)
+        public LinearRgb ToLinearRgb(in Hsl color)
         {
             var rgb = this.ToRgb(color);
             return this.ToLinearRgb(rgb);
@@ -113,7 +113,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(Hsv color)
+        public LinearRgb ToLinearRgb(in Hsv color)
         {
             var rgb = this.ToRgb(color);
             return this.ToLinearRgb(rgb);
@@ -124,7 +124,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(HunterLab color)
+        public LinearRgb ToLinearRgb(in HunterLab color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLinearRgb(xyzColor);
@@ -135,7 +135,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(Lms color)
+        public LinearRgb ToLinearRgb(in Lms color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLinearRgb(xyzColor);
@@ -146,7 +146,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(Rgb color)
+        public LinearRgb ToLinearRgb(in Rgb color)
         {
             // Conversion
             return RgbToLinearRgbConverter.Convert(color);
@@ -157,7 +157,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="LinearRgb"/></returns>
-        public LinearRgb ToLinearRgb(YCbCr color)
+        public LinearRgb ToLinearRgb(in YCbCr color)
         {
             var rgb = this.ToRgb(color);
             return this.ToLinearRgb(rgb);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Lms.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Lms.cs
index 1de0d70d3..3293e2f4a 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Lms.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Lms.cs
@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(CieLab color)
+        public Lms ToLms(in CieLab color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -26,7 +26,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(CieLch color)
+        public Lms ToLms(in CieLch color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -37,7 +37,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(CieLchuv color)
+        public Lms ToLms(in CieLchuv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -48,7 +48,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(CieLuv color)
+        public Lms ToLms(in CieLuv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -59,7 +59,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(CieXyy color)
+        public Lms ToLms(in CieXyy color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -70,7 +70,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(CieXyz color)
+        public Lms ToLms(in CieXyz color)
         {
             return this.cachedCieXyzAndLmsConverter.Convert(color);
         }
@@ -80,7 +80,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(Cmyk color)
+        public Lms ToLms(in Cmyk color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -91,7 +91,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(Hsl color)
+        public Lms ToLms(in Hsl color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -102,7 +102,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(Hsv color)
+        public Lms ToLms(in Hsv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -113,7 +113,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(HunterLab color)
+        public Lms ToLms(in HunterLab color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -124,7 +124,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(LinearRgb color)
+        public Lms ToLms(in LinearRgb color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -135,7 +135,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(Rgb color)
+        public Lms ToLms(in Rgb color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
@@ -146,7 +146,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Lms"/></returns>
-        public Lms ToLms(YCbCr color)
+        public Lms ToLms(in YCbCr color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToLms(xyzColor);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Rgb.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Rgb.cs
index b609934e9..5bfb6ee05 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Rgb.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.Rgb.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(CieLab color)
+        public Rgb ToRgb(in CieLab color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToRgb(xyzColor);
@@ -28,7 +28,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(CieLch color)
+        public Rgb ToRgb(in CieLch color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToRgb(xyzColor);
@@ -39,7 +39,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(CieLchuv color)
+        public Rgb ToRgb(in CieLchuv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToRgb(xyzColor);
@@ -50,7 +50,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(CieLuv color)
+        public Rgb ToRgb(in CieLuv color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToRgb(xyzColor);
@@ -61,7 +61,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(CieXyy color)
+        public Rgb ToRgb(in CieXyy color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToRgb(xyzColor);
@@ -72,7 +72,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(CieXyz color)
+        public Rgb ToRgb(in CieXyz color)
         {
             // Conversion
             var linear = this.ToLinearRgb(color);
@@ -86,7 +86,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(Cmyk color)
+        public Rgb ToRgb(in Cmyk color)
         {
             // Conversion
             return CmykAndRgbConverter.Convert(color);
@@ -97,7 +97,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(Hsv color)
+        public Rgb ToRgb(in Hsv color)
         {
             // Conversion
             return HsvAndRgbConverter.Convert(color);
@@ -108,7 +108,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(Hsl color)
+        public Rgb ToRgb(in Hsl color)
         {
             // Conversion
             return HslAndRgbConverter.Convert(color);
@@ -119,7 +119,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(HunterLab color)
+        public Rgb ToRgb(in HunterLab color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToRgb(xyzColor);
@@ -130,7 +130,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(LinearRgb color)
+        public Rgb ToRgb(in LinearRgb color)
         {
             // Conversion
             return LinearRgbToRgbConverter.Convert(color);
@@ -141,7 +141,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(Lms color)
+        public Rgb ToRgb(in Lms color)
         {
             var xyzColor = this.ToCieXyz(color);
             return this.ToRgb(xyzColor);
@@ -152,7 +152,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="Rgb"/></returns>
-        public Rgb ToRgb(YCbCr color)
+        public Rgb ToRgb(in YCbCr color)
         {
             // Conversion
             Rgb rgb = YCbCrAndRgbConverter.Convert(color);
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.YCbCr.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.YCbCr.cs
index 97d9f3818..b7fe34f41 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.YCbCr.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.YCbCr.cs
@@ -17,7 +17,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(CieLab color)
+        public YCbCr ToYCbCr(in CieLab color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -29,7 +29,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(CieLch color)
+        public YCbCr ToYCbCr(in CieLch color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -41,7 +41,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(CieLchuv color)
+        public YCbCr ToYCbCr(in CieLchuv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -53,7 +53,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(CieLuv color)
+        public YCbCr ToYCbCr(in CieLuv color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -65,7 +65,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(CieXyy color)
+        public YCbCr ToYCbCr(in CieXyy color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -77,7 +77,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(CieXyz color)
+        public YCbCr ToYCbCr(in CieXyz color)
         {
             var rgb = this.ToRgb(color);
 
@@ -89,7 +89,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(Cmyk color)
+        public YCbCr ToYCbCr(in Cmyk color)
         {
             var rgb = this.ToRgb(color);
 
@@ -101,7 +101,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(Hsl color)
+        public YCbCr ToYCbCr(in Hsl color)
         {
             var rgb = this.ToRgb(color);
 
@@ -113,7 +113,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(Hsv color)
+        public YCbCr ToYCbCr(in Hsv color)
         {
             var rgb = this.ToRgb(color);
 
@@ -125,7 +125,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(HunterLab color)
+        public YCbCr ToYCbCr(in HunterLab color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -137,7 +137,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(LinearRgb color)
+        public YCbCr ToYCbCr(in LinearRgb color)
         {
             var rgb = this.ToRgb(color);
 
@@ -149,7 +149,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(Lms color)
+        public YCbCr ToYCbCr(in Lms color)
         {
             var xyzColor = this.ToCieXyz(color);
 
@@ -161,7 +161,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="color">The color to convert.</param>
         /// <returns>The <see cref="YCbCr"/></returns>
-        public YCbCr ToYCbCr(Rgb color)
+        public YCbCr ToYCbCr(in Rgb color)
         {
             return YCbCrAndRgbConverter.Convert(color);
         }