YCrCr should use byte

src/ImageSharp/Colors/Spaces/YCbCr.cs

@@ -51,19 +51,19 @@ namespace ImageSharp.Colors.Spaces
         /// Gets the Y luminance component.
         /// <remarks>A value ranging between 0 and 255.</remarks>
         /// </summary>
-        public float Y => this.backingVector.X;
+        public byte Y => (byte)this.backingVector.X;
 
         /// <summary>
         /// Gets the Cb chroma component.
         /// <remarks>A value ranging between 0 and 255.</remarks>
         /// </summary>
-        public float Cb => this.backingVector.Y;
+        public byte Cb => (byte)this.backingVector.Y;
 
         /// <summary>
         /// Gets the Cr chroma component.
         /// <remarks>A value ranging between 0 and 255.</remarks>
         /// </summary>
-        public float Cr => this.backingVector.Z;
+        public byte Cr => (byte)this.backingVector.Z;
 
         /// <summary>
         /// Gets a value indicating whether this <see cref="YCbCr"/> is empty.

tests/ImageSharp.Tests/Colors/ColorConversionTests.cs

@@ -48,24 +48,6 @@ namespace ImageSharp.Tests
             Assert.Equal(128, yCbCr3.Y);
             Assert.Equal(128, yCbCr3.Cb);
             Assert.Equal(128, yCbCr3.Cr);
-
-            //Assert.Equal(255, yCbCr.Y, 0);
-            //Assert.Equal(128, yCbCr.Cb, 0);
-            //Assert.Equal(128, yCbCr.Cr, 0);
-
-            //// Black
-            //Color color2 = Color.Black;
-            //YCbCr yCbCr2 = color2;
-            //Assert.Equal(0, yCbCr2.Y, 0);
-            //Assert.Equal(128, yCbCr2.Cb, 0);
-            //Assert.Equal(128, yCbCr2.Cr, 0);
-
-            //// Gray
-            //Color color3 = Color.Gray;
-            //YCbCr yCbCr3 = color3;
-            //Assert.Equal(128, yCbCr3.Y, 0);
-            //Assert.Equal(128, yCbCr3.Cb, 0);
-            //Assert.Equal(128, yCbCr3.Cr, 0);
         }
 
         /// <summary>