diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
index ff3822c86..f4f28401f 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.CieXyz.cs
@@ -211,7 +211,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="workingSpace">The source working space</param>
         /// <returns>The <see cref="LinearRgbToCieXyzConverter"/></returns>
-        private LinearRgbToCieXyzConverter GetLinearRgbToCieXyzConverter(IRgbWorkingSpace workingSpace)
+        private LinearRgbToCieXyzConverter GetLinearRgbToCieXyzConverter(RgbWorkingSpace workingSpace)
         {
             if (this.linearRgbToCieXyzConverter != null && this.linearRgbToCieXyzConverter.SourceWorkingSpace.Equals(workingSpace))
             {
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs
index 6cfdb4853..5fdde5c75 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.LinearRgb.cs
@@ -168,7 +168,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// </summary>
         /// <param name="workingSpace">The target working space</param>
         /// <returns>The <see cref="CieXyzToLinearRgbConverter"/></returns>
-        private CieXyzToLinearRgbConverter GetCieXyxToLinearRgbConverter(IRgbWorkingSpace workingSpace)
+        private CieXyzToLinearRgbConverter GetCieXyxToLinearRgbConverter(RgbWorkingSpace workingSpace)
         {
             if (this.cieXyzToLinearRgbConverter != null && this.cieXyzToLinearRgbConverter.TargetWorkingSpace.Equals(workingSpace))
             {
diff --git a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.cs
index f86f50538..7142ab0e8 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/ColorSpaceConverter.cs
@@ -2,8 +2,8 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System.Numerics;
-using SixLabors.ImageSharp.ColorSpaces;
 using SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.LmsColorSapce;
+using SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSapce;
 
 namespace SixLabors.ImageSharp.ColorSpaces.Conversion
 {
@@ -64,7 +64,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
         /// Gets or sets the target working space used *when creating* RGB colors. (RGB colors on the input already contain the working space information)
         /// Defaults to: <see cref="Rgb.DefaultWorkingSpace"/>.
         /// </summary>
-        public IRgbWorkingSpace TargetRgbWorkingSpace { get; set; }
+        public RgbWorkingSpace TargetRgbWorkingSpace { get; set; }
 
         /// <summary>
         /// Gets or sets the chromatic adaptation method used. When null, no adaptation will be performed.
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/CieXyzToLinearRgbConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/CieXyzToLinearRgbConverter.cs
index e75d4a804..217698c23 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/CieXyzToLinearRgbConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/CieXyzToLinearRgbConverter.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSap
     /// <summary>
     /// Color converter between CieXyz and LinearRgb
     /// </summary>
-    internal class CieXyzToLinearRgbConverter : LinearRgbAndCieXyzConverterBase, IColorConversion<CieXyz, LinearRgb>
+    internal sealed class CieXyzToLinearRgbConverter : LinearRgbAndCieXyzConverterBase, IColorConversion<CieXyz, LinearRgb>
     {
         private readonly Matrix4x4 conversionMatrix;
 
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSap
         /// Initializes a new instance of the <see cref="CieXyzToLinearRgbConverter"/> class.
         /// </summary>
         /// <param name="workingSpace">The target working space.</param>
-        public CieXyzToLinearRgbConverter(IRgbWorkingSpace workingSpace)
+        public CieXyzToLinearRgbConverter(RgbWorkingSpace workingSpace)
         {
             this.TargetWorkingSpace = workingSpace;
             this.conversionMatrix = GetRgbToCieXyzMatrix(workingSpace);
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSap
         /// <summary>
         /// Gets the target working space
         /// </summary>
-        public IRgbWorkingSpace TargetWorkingSpace { get; }
+        public RgbWorkingSpace TargetWorkingSpace { get; }
 
         /// <inheritdoc/>
         public LinearRgb Convert(in CieXyz input)
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/LinearRgbAndCieXyzConverterBase.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/LinearRgbAndCieXyzConverterBase.cs
index a0da2bc26..bc11c51b5 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/LinearRgbAndCieXyzConverterBase.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/LinearRgbAndCieXyzConverterBase.cs
@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSap
         /// </summary>
         /// <param name="workingSpace">The Rgb working space.</param>
         /// <returns>The <see cref="Matrix4x4"/> based on the chromaticity and working space.</returns>
-        public static Matrix4x4 GetRgbToCieXyzMatrix(IRgbWorkingSpace workingSpace)
+        public static Matrix4x4 GetRgbToCieXyzMatrix(RgbWorkingSpace workingSpace)
         {
             DebugGuard.NotNull(workingSpace, nameof(workingSpace));
 
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/LinearRgbToCieXyzConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/LinearRgbToCieXyzConverter.cs
index 05cd5b72f..e597b66af 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/LinearRgbToCieXyzConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/LinearRgbToCieXyzConverter.cs
@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSap
     /// <summary>
     /// Color converter between LinearRgb and CieXyz
     /// </summary>
-    internal class LinearRgbToCieXyzConverter : LinearRgbAndCieXyzConverterBase, IColorConversion<LinearRgb, CieXyz>
+    internal sealed class LinearRgbToCieXyzConverter : LinearRgbAndCieXyzConverterBase, IColorConversion<LinearRgb, CieXyz>
     {
         private readonly Matrix4x4 conversionMatrix;
 
@@ -24,7 +24,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSap
         /// Initializes a new instance of the <see cref="LinearRgbToCieXyzConverter"/> class.
         /// </summary>
         /// <param name="workingSpace">The target working space.</param>
-        public LinearRgbToCieXyzConverter(IRgbWorkingSpace workingSpace)
+        public LinearRgbToCieXyzConverter(RgbWorkingSpace workingSpace)
         {
             this.SourceWorkingSpace = workingSpace;
             this.conversionMatrix = GetRgbToCieXyzMatrix(workingSpace);
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSap
         /// <summary>
         /// Gets the source working space
         /// </summary>
-        public IRgbWorkingSpace SourceWorkingSpace { get; }
+        public RgbWorkingSpace SourceWorkingSpace { get; }
 
         /// <inheritdoc/>
         public CieXyz Convert(in LinearRgb input)
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/RGBPrimariesChromaticityCoordinates.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/RGBPrimariesChromaticityCoordinates.cs
index 8afe2ffa0..4359d666e 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/RGBPrimariesChromaticityCoordinates.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/RGBPrimariesChromaticityCoordinates.cs
@@ -7,7 +7,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSap
 {
     /// <summary>
     /// Represents the chromaticity coordinates of RGB primaries.
-    /// One of the specifiers of <see cref="IRgbWorkingSpace"/>.
+    /// One of the specifiers of <see cref="RgbWorkingSpace"/>.
     /// </summary>
     internal readonly struct RgbPrimariesChromaticityCoordinates : IEquatable<RgbPrimariesChromaticityCoordinates>
     {
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/RgbWorkingSpace.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/RgbWorkingSpace.cs
index d4d00db86..f4a79c744 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/RgbWorkingSpace.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Rgb/RgbWorkingSpace.cs
@@ -4,9 +4,9 @@
 namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSapce
 {
     /// <summary>
-    /// Trivial implementation of <see cref="IRgbWorkingSpace"/>
+    /// Trivial implementation of <see cref="RgbWorkingSpace"/>
     /// </summary>
-    internal class RgbWorkingSpace : IRgbWorkingSpace
+    internal class RgbWorkingSpace
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="RgbWorkingSpace"/> class.
@@ -70,14 +70,12 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSap
             return !Equals(left, right);
         }
 
-        /// <inheritdoc/>
         public override bool Equals(object obj)
         {
             return obj is RgbWorkingSpace other && this.Equals(other);
         }
 
-        /// <inheritdoc/>
-        public bool Equals(IRgbWorkingSpace other)
+        public bool Equals(RgbWorkingSpace other)
         {
             // TODO: Object.Equals for ICompanding will be slow.
             return this.WhitePoint.Equals(other.WhitePoint)
diff --git a/src/ImageSharp/ColorSpaces/ICompanding.cs b/src/ImageSharp/ColorSpaces/ICompanding.cs
index 2dfa575ed..17a7c874c 100644
--- a/src/ImageSharp/ColorSpaces/ICompanding.cs
+++ b/src/ImageSharp/ColorSpaces/ICompanding.cs
@@ -4,9 +4,9 @@
 namespace SixLabors.ImageSharp.ColorSpaces
 {
     /// <summary>
-    /// Pair of companding functions for <see cref="IRgbWorkingSpace"/>.
+    /// Pair of companding functions for <see cref="RgbWorkingSpace"/>.
     /// Used for conversion to <see cref="CieXyz"/> and backwards.
-    /// See also: <seealso cref="IRgbWorkingSpace.Companding"/>
+    /// See also: <seealso cref="RgbWorkingSpace.Companding"/>
     /// </summary>
     internal interface ICompanding
     {
diff --git a/src/ImageSharp/ColorSpaces/IRgbWorkingSpace.cs b/src/ImageSharp/ColorSpaces/IRgbWorkingSpace.cs
deleted file mode 100644
index 26c4ad6d4..000000000
--- a/src/ImageSharp/ColorSpaces/IRgbWorkingSpace.cs
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSapce;
-
-namespace SixLabors.ImageSharp.ColorSpaces
-{
-    /// <summary>
-    /// Encasulates the RGB working color space
-    /// </summary>
-    internal interface IRgbWorkingSpace : IEquatable<IRgbWorkingSpace>
-    {
-        /// <summary>
-        /// Gets the reference white of the color space.
-        /// </summary>
-        CieXyz WhitePoint { get; }
-
-        /// <summary>
-        /// Gets the chromaticity coordinates of the primaries.
-        /// </summary>
-        RgbPrimariesChromaticityCoordinates ChromaticityCoordinates { get; }
-
-        /// <summary>
-        /// Gets the companding function associated with the RGB color system. Used for conversion to XYZ and backwards.
-        /// <see href="http://www.brucelindbloom.com/index.html?Eqn_RGB_to_XYZ.html"/>
-        /// <see href="http://www.brucelindbloom.com/index.html?Eqn_XYZ_to_RGB.html"/>
-        /// </summary>
-        ICompanding Companding { get; }
-    }
-}
\ No newline at end of file
diff --git a/src/ImageSharp/ColorSpaces/LinearRgb.cs b/src/ImageSharp/ColorSpaces/LinearRgb.cs
index 312187c9d..aaf05e035 100644
--- a/src/ImageSharp/ColorSpaces/LinearRgb.cs
+++ b/src/ImageSharp/ColorSpaces/LinearRgb.cs
@@ -2,21 +2,21 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.ComponentModel;
 using System.Numerics;
 using System.Runtime.CompilerServices;
+using SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSapce;
 
 namespace SixLabors.ImageSharp.ColorSpaces
 {
     /// <summary>
-    /// Represents an linear Rgb color with specified <see cref="IRgbWorkingSpace"/> working space
+    /// Represents an linear Rgb color with specified <see cref="RgbWorkingSpace"/> working space
     /// </summary>
     internal readonly struct LinearRgb : IColorVector, IEquatable<LinearRgb>, IAlmostEquatable<LinearRgb, float>
     {
         /// <summary>
         /// The default LinearRgb working space.
         /// </summary>
-        public static readonly IRgbWorkingSpace DefaultWorkingSpace = RgbWorkingSpaces.SRgb;
+        public static readonly RgbWorkingSpace DefaultWorkingSpace = RgbWorkingSpaces.SRgb;
 
         /// <summary>
         /// The backing vector for SIMD support.
@@ -43,7 +43,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <param name="b">The blue component ranging between 0 and 1.</param>
         /// <param name="workingSpace">The rgb working space.</param>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public LinearRgb(float r, float g, float b, IRgbWorkingSpace workingSpace)
+        public LinearRgb(float r, float g, float b, RgbWorkingSpace workingSpace)
             : this(new Vector3(r, g, b), workingSpace)
         {
         }
@@ -64,7 +64,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <param name="vector">The vector representing the r, g, b components.</param>
         /// <param name="workingSpace">The LinearRgb working space.</param>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public LinearRgb(Vector3 vector, IRgbWorkingSpace workingSpace)
+        public LinearRgb(Vector3 vector, RgbWorkingSpace workingSpace)
             : this()
         {
             // Clamp to 0-1 range.
@@ -105,7 +105,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <summary>
         /// Gets the LinearRgb color space <seealso cref="RgbWorkingSpaces"/>
         /// </summary>
-        public IRgbWorkingSpace WorkingSpace { get; }
+        public RgbWorkingSpace WorkingSpace { get; }
 
         /// <inheritdoc />
         public Vector3 Vector => this.backingVector;
diff --git a/src/ImageSharp/ColorSpaces/Rgb.cs b/src/ImageSharp/ColorSpaces/Rgb.cs
index 777e1f4c1..ccfa1760f 100644
--- a/src/ImageSharp/ColorSpaces/Rgb.cs
+++ b/src/ImageSharp/ColorSpaces/Rgb.cs
@@ -2,23 +2,22 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.ComponentModel;
 using System.Numerics;
 using System.Runtime.CompilerServices;
-
+using SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation.RgbColorSapce;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.ColorSpaces
 {
     /// <summary>
-    /// Represents an RGB color with specified <see cref="IRgbWorkingSpace"/> working space
+    /// Represents an RGB color with specified <see cref="RgbWorkingSpace"/> working space
     /// </summary>
     internal readonly struct Rgb : IColorVector, IEquatable<Rgb>, IAlmostEquatable<Rgb, float>
     {
         /// <summary>
         /// The default rgb working space
         /// </summary>
-        public static readonly IRgbWorkingSpace DefaultWorkingSpace = RgbWorkingSpaces.SRgb;
+        public static readonly RgbWorkingSpace DefaultWorkingSpace = RgbWorkingSpaces.SRgb;
 
         /// <summary>
         /// The backing vector for SIMD support.
@@ -45,7 +44,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <param name="b">The blue component ranging between 0 and 1.</param>
         /// <param name="workingSpace">The rgb working space.</param>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public Rgb(float r, float g, float b, IRgbWorkingSpace workingSpace)
+        public Rgb(float r, float g, float b, RgbWorkingSpace workingSpace)
             : this(new Vector3(r, g, b), workingSpace)
         {
         }
@@ -66,7 +65,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <param name="vector">The vector representing the r, g, b components.</param>
         /// <param name="workingSpace">The rgb working space.</param>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public Rgb(Vector3 vector, IRgbWorkingSpace workingSpace)
+        public Rgb(Vector3 vector, RgbWorkingSpace workingSpace)
             : this()
         {
             // Clamp to 0-1 range.
@@ -107,7 +106,7 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <summary>
         /// Gets the Rgb color space <seealso cref="RgbWorkingSpaces"/>
         /// </summary>
-        public IRgbWorkingSpace WorkingSpace { get; }
+        public RgbWorkingSpace WorkingSpace { get; }
 
         /// <inheritdoc />
         public Vector3 Vector => this.backingVector;
diff --git a/tests/ImageSharp.Tests/TestUtilities/ApproximateFloatComparer.cs b/tests/ImageSharp.Tests/TestUtilities/ApproximateFloatComparer.cs
index 24363173a..102a629be 100644
--- a/tests/ImageSharp.Tests/TestUtilities/ApproximateFloatComparer.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/ApproximateFloatComparer.cs
@@ -15,7 +15,7 @@ namespace SixLabors.ImageSharp.Tests
         IEqualityComparer<CieXyChromaticityCoordinates>,
         IEqualityComparer<RgbPrimariesChromaticityCoordinates>,
         IEqualityComparer<CieXyz>,
-        IEqualityComparer<IRgbWorkingSpace>
+        IEqualityComparer<RgbWorkingSpace>
     {
         private readonly float Eps;
 
@@ -76,9 +76,9 @@ namespace SixLabors.ImageSharp.Tests
             throw new NotImplementedException();
         }
 
-        public bool Equals(IRgbWorkingSpace x, IRgbWorkingSpace y)
+        public bool Equals(RgbWorkingSpace x, RgbWorkingSpace y)
         {
-            if (x is IRgbWorkingSpace g1 && y is IRgbWorkingSpace g2)
+            if (x is RgbWorkingSpace g1 && y is RgbWorkingSpace g2)
             {
                 return this.Equals(g1.WhitePoint, g2.WhitePoint)
                     && this.Equals(g1.ChromaticityCoordinates, g2.ChromaticityCoordinates);
@@ -88,7 +88,7 @@ namespace SixLabors.ImageSharp.Tests
                 && this.Equals(x.ChromaticityCoordinates, y.ChromaticityCoordinates);
         }
 
-        public int GetHashCode(IRgbWorkingSpace obj)
+        public int GetHashCode(RgbWorkingSpace obj)
         {
             throw new NotImplementedException();
         }