diff --git a/app/assets/stylesheets/highlight/dark.scss b/app/assets/stylesheets/highlight/dark.scss
index 8464727de9..c7f7a5aaf0 100644
--- a/app/assets/stylesheets/highlight/dark.scss
+++ b/app/assets/stylesheets/highlight/dark.scss
@@ -22,11 +22,11 @@
   // Diff line
   .line_holder {
     .diff-line-num.new, .line_content.new {
-      @include diff_background(rgba(51, 255, 51, 0.1), rgba(51, 255, 51, 0.2), #808080);
+      @include diff_background(rgba(51, 255, 51, 0.1), rgba(51, 255, 51, 0.3), #808080);
     }
 
     .diff-line-num.old, .line_content.old {
-      @include diff_background(rgba(255, 51, 51, 0.2), rgba(255, 51, 51, 0.2), #808080);
+      @include diff_background(rgba(255, 51, 51, 0.2), rgba(255, 51, 51, 0.3), #808080);
     }
 
     .line_content.match {