diff --git a/res/values-v21/theme.xml b/res/values-v21/theme.xml
index bbc06227..9e7bf0b4 100644
--- a/res/values-v21/theme.xml
+++ b/res/values-v21/theme.xml
@@ -23,6 +23,7 @@ THE SOFTWARE.
 <resources>
 	<!-- Color used in LibraryActivity list dividers -->
 	<color name="divider_color">#00ff00</color>
+	<color name="overlay_color">#aeee</color>
 
 	<!-- Material design primary colors -->
 	<color name="vanillaPrimary">#9e9d24</color>