diff --git a/headers/os/interface/InterfaceDefs.h b/headers/os/interface/InterfaceDefs.h
index 36ffd8a9e0..cfda7b0930 100644
--- a/headers/os/interface/InterfaceDefs.h
+++ b/headers/os/interface/InterfaceDefs.h
@@ -327,7 +327,22 @@ enum color_which {
 	B_MENU_SELECTED_ITEM_TEXT_COLOR = 8,
 	B_WINDOW_TAB_COLOR = 3,
 	B_KEYBOARD_NAVIGATION_COLOR = 4,
-	B_DESKTOP_COLOR = 5
+	B_DESKTOP_COLOR = 5,
+
+	// OpenBeOS R1 expanded attributes
+	B_PANEL_TEXT_COLOR = 6,
+	B_DOCUMENT_BACKGROUND_COLOR = 7,
+	B_DOCUMENT_TEXT_COLOR = 8,
+	B_CONTROL_BACKGROUND_COLOR = 9,
+	B_CONTROL_TEXT_COLOR = 10,
+	B_CONTROL_HIGHLIGHT_COLOR = 11,
+	B_CONTROL_BORDER_COLOR = 12,
+	B_TOOLTIP_BACKGROUND_COLOR = 13,
+	B_TOOLTIP_TEXT_COLOR = 14,
+
+	B_WINDOW_TAB_TEXT_COLOR = 15,
+	B_INACTIVE_WINDOW_TAB_COLOR = 16,
+	B_INACTIVE_WINDOW_TAB_TEXT_COLOR = 17
 };
 
 _IMPEXP_BE rgb_color	ui_color(color_which which);