diff --git a/main.org b/main.org
index 0b6244c..4af9bfe 100644
--- a/main.org
+++ b/main.org
@@ -268,6 +268,8 @@ We all know the web is the future, obviously, of course.
   "\\.tsx?\\'")
 (leaf php-mode
   :ensure t)
+(leaf rainbow-mode
+  :ensure t)
 #+end_src
 
 * D2