diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 6688e1084b..ed31a10cf8 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -738,6 +738,7 @@ Dart:
 
 Diff:
   type: programming
+  color: "#88dddd"
   extensions:
   - .diff
   - .patch