diff --git a/src/Design.cs b/src/Design.cs
index 03bab06e..4b6fae7f 100644
--- a/src/Design.cs
+++ b/src/Design.cs
@@ -163,8 +163,8 @@ public Design CreateSubControlDesign(string name, View subView)
             super.Remove(subView);
             if (subView.Border != null)
             {
-                subView.Border.BorderBrush = (Color)borderBrush!;
-                subView.Border.Background = (Color)background!;
+                subView.Border.BorderBrush = borderBrush!;
+                subView.Border.Background = background!;
             }
         }