diff --git a/theme-github-dark.css b/theme-github-dark.css
index 03aa99a..f9bd7bf 100644
--- a/theme-github-dark.css
+++ b/theme-github-dark.css
@@ -534,3 +534,12 @@ a.blob-excerpt {
   height: 17px;
   padding: 3px;
 }
+
+.removed-code {
+  background: #b70f22;
+  color: var(--color-text);
+}
+.added-code {
+  background: #0d8b2c;
+  color: var(--color-text);
+}