diff --git a/components/style/values/specified/color.rs b/components/style/values/specified/color.rs
index 866a33273c8..867536a0230 100644
--- a/components/style/values/specified/color.rs
+++ b/components/style/values/specified/color.rs
@@ -231,10 +231,6 @@ pub enum Color {
 #[derive(Clone, Copy, Debug, MallocSizeOf, Parse, PartialEq, ToCss, ToShmem)]
 #[repr(u8)]
 pub enum SystemColor {
-    #[css(skip)]
-    WindowBackground,
-    #[css(skip)]
-    WindowForeground,
     #[css(skip)]
     WidgetBackground,
     #[css(skip)]