diff --git a/include/colors.h b/include/colors.h
index a40d81428..98e01d626 100755
--- a/include/colors.h
+++ b/include/colors.h
@@ -8,6 +8,9 @@
 extern COLOR MASK_BACK_COLOR;
 extern COLOR MASK_LIGHT_COLOR;
 extern COLOR MASK_DARK_COLOR;
+extern COLOR BTN_BACK_COLOR;
+extern COLOR BTN_LIGHT_COLOR;
+extern COLOR BTN_DARK_COLOR;
 extern COLOR TOOL_BACK_COLOR;
 extern COLOR NORMAL_COLOR;
 extern COLOR NORMAL_BACK_COLOR;