diff --git a/app/assets/stylesheets/application.scss b/app/assets/stylesheets/application.scss
index 79311766..3144693d 100644
--- a/app/assets/stylesheets/application.scss
+++ b/app/assets/stylesheets/application.scss
@@ -305,5 +305,6 @@ svg {
 
   mark {
     padding: 0;
+    background-color: $cyan;
   }
 }