更新

WPFDark/Internals/ColorHelper.cs

@@ -0,0 +1,23 @@
+using System.Windows.Media;
+
+namespace WPFDark.Internals
+{
+    internal static class ColorHelper
+    {
+        internal static Color Lerp(double ratio, Color c1, Color c2)
+            => Color.FromArgb(
+                (byte)((c2.A - c1.A) * ratio + c1.A),
+                (byte)((c2.R - c1.R) * ratio + c1.R),
+                (byte)((c2.G - c1.G) * ratio + c1.G),
+                (byte)((c2.B - c1.B) * ratio + c1.B));
+        
+        
+        internal static ByteColor Lerp(double ratio, ByteColor c1, ByteColor c2)
+            => new ByteColor(
+                (byte)((c2.A - c1.A) * ratio + c1.A),
+                (byte)((c2.R - c1.R) * ratio + c1.R),
+                (byte)((c2.G - c1.G) * ratio + c1.G),
+                (byte)((c2.B - c1.B) * ratio + c1.B));
+        
+    }
+}