diff --git a/res/themes/dark/css/_dark.scss b/res/themes/dark/css/_dark.scss
index eadde4c672..d1d0e333a0 100644
--- a/res/themes/dark/css/_dark.scss
+++ b/res/themes/dark/css/_dark.scss
@@ -243,3 +243,12 @@ $breadcrumb-placeholder-bg-color: #272c35;
         }
     }
 }
+
+// Fixes diff color inversion by swapping add / del colors
+.hljs-addition {
+    background: #fdd;
+}
+
+.hljs-deletion {
+    background: #dfd;
+}