Fixed #1185

Author: joachimmarder

Source/VirtualTrees.Colors.pas

@@ -142,7 +142,7 @@ function TVTColors.GetColor(const Index : TVTColorEnum) : TColor;
 begin
   //Only try to fetch the color via StyleServices if theses are enabled
   //Return default/user defined color otherwise
-  if TreeView.VclStyleEnabled then
+  if not (csDesigning in TreeView.ComponentState) { see issue #1185 } and TreeView.VclStyleEnabled then
   begin
     //If the ElementDetails are not defined, fall back to the SystemColor
     case Index of