diff --git a/theme-arc-blue.css b/theme-arc-blue.css
index e2b5814..b6eea38 100644
--- a/theme-arc-blue.css
+++ b/theme-arc-blue.css
@@ -1206,3 +1206,6 @@ ui.search > .results {
 .ui.search > .results .result .description {
   color: #bbd5baaa;
 }
+.code-diff-split .del-code .lines-num-new, .code-diff-split .del-code .lines-type-marker-new, .code-diff-split .del-code .lines-code-new, .code-diff-split .del-code .lines-escape-new, .code-diff-split .add-code .lines-num-old, .code-diff-split .add-code .lines-escape-old, .code-diff-split .add-code .lines-type-marker-old, .code-diff-split .add-code .lines-code-old {
+  background: inherit;
+}