diff --git a/theme/standard/styles_color.css b/theme/standard/styles_color.css
index a9bc3b98fad..5fd564ce8e8 100644
--- a/theme/standard/styles_color.css
+++ b/theme/standard/styles_color.css
@@ -484,6 +484,7 @@ table.minicalendar {
   background: #FFD991;
 }
 
+#course-view .weekscss .hidden,
 #course-view .hidden td.side {
   background: #DDDDDD;
 }