diff --git a/components/style/values/specified/color.rs b/components/style/values/specified/color.rs
index c70d69e01b8..dc311680b36 100644
--- a/components/style/values/specified/color.rs
+++ b/components/style/values/specified/color.rs
@@ -562,10 +562,17 @@ fn parse_hash_color(value: &[u8]) -> Result<RGBA, ()> {
 
 impl Color {
     /// Returns whether this color is a system color.
+    #[cfg(feature = "gecko")]
     pub fn is_system(&self) -> bool {
         matches!(self, Color::System(..))
     }
 
+    /// Returns whether this color is a system color.
+    #[cfg(feature = "servo")]
+    pub fn is_system(&self) -> bool {
+        false
+    }
+
     /// Returns currentcolor value.
     #[inline]
     pub fn currentcolor() -> Color {