diff --git a/theme/oceanblue/styles_color.css b/theme/oceanblue/styles_color.css
index fc0820ce4c2..d2a678c9748 100644
--- a/theme/oceanblue/styles_color.css
+++ b/theme/oceanblue/styles_color.css
@@ -489,7 +489,7 @@ table.minicalendar {
 }
 
 .categoryboxcontent,
-.courseboxcontent {
+.coursebox {
   border-color:#9999FF;
   background-color: #FFFFFF;
 }