diff --git a/widget/LookAndFeel.h b/widget/LookAndFeel.h
index 4530b543e386..34af30cc3dcc 100644
--- a/widget/LookAndFeel.h
+++ b/widget/LookAndFeel.h
@@ -425,6 +425,11 @@ class LookAndFeel {
   // This is currently ignored (but won't be for long).
   enum class ColorScheme : uint8_t { Light, Dark };
 
+  static ColorScheme SystemColorScheme() {
+    return GetInt(IntID::SystemUsesDarkTheme) ? ColorScheme::Dark
+                                              : ColorScheme::Light;
+  }
+
   // Whether standins for native colors should be used (that is, colors faked,
   // taken from win7, mostly). This forces light appearance, effectively.
   enum class UseStandins : bool { No, Yes };