Changed color to be an immutable value-type

RGB.NET.Brushes/Brushes/SolidColorBrush.cs

@@ -37,10 +37,7 @@ namespace RGB.NET.Brushes
         #region Methods
 
         /// <inheritdoc />
-        protected override Color GetColorAtPoint(Rectangle rectangle, BrushRenderTarget renderTarget)
-        {
-            return Color;
-        }
+        protected override Color GetColorAtPoint(Rectangle rectangle, BrushRenderTarget renderTarget) => Color;
 
         #endregion
 
@@ -50,19 +47,13 @@ namespace RGB.NET.Brushes
         /// Converts a <see cref="Color" /> to a <see cref="SolidColorBrush" />.
         /// </summary>
         /// <param name="color">The <see cref="Color"/> to convert.</param>
-        public static explicit operator SolidColorBrush(Color color)
-        {
-            return new SolidColorBrush(color);
-        }
+        public static explicit operator SolidColorBrush(Color color) => new SolidColorBrush(color);
 
         /// <summary>
         /// Converts a <see cref="SolidColorBrush" /> to a <see cref="Color" />.
         /// </summary>
         /// <param name="brush">The <see cref="Color"/> to convert.</param>
-        public static implicit operator Color(SolidColorBrush brush)
-        {
-            return brush.Color;
-        }
+        public static implicit operator Color(SolidColorBrush brush) => brush.Color;
 
         #endregion
     }

RGB.NET.Brushes/Gradients/LinearGradient.cs

@@ -53,7 +53,7 @@ namespace RGB.NET.Brushes.Gradients
         public override Color GetColor(double offset)
         {
             if (GradientStops.Count == 0) return Color.Transparent;
-            if (GradientStops.Count == 1) return new Color(GradientStops[0].Color);
+            if (GradientStops.Count == 1) return GradientStops[0].Color;
 
             (GradientStop gsBefore, GradientStop gsAfter) = GetEnclosingGradientStops(offset, GradientStops, WrapGradient);
 

RGB.NET.Brushes/Gradients/RainbowGradient.cs

@@ -56,7 +56,7 @@ namespace RGB.NET.Brushes.Gradients
             double hue = (StartHue + (range * offset)) % 360f;
             if (hue < 0)
                 hue += 360;
-            return new Color(hue, 1f, 1f);
+            return Color.FromHSV(hue, 1, 1);
         }
 
         /// <inheritdoc />