diff --git a/init.el b/init.el
index 0f1a9b6..460538b 100644
--- a/init.el
+++ b/init.el
@@ -714,6 +714,8 @@ DOCSTRING is an optional form that is discarded upon expansion."
   (eval-after-load 'flymake #'adwaita-dark-theme-flymake-fringe-bmp-enable)
   (eval-after-load 'flycheck #'adwaita-dark-theme-flycheck-fringe-bmp-enable)
   (eval-after-load 'neotree #'adwaita-dark-theme-neotree-configuration-enable)
+  :custom
+  (adwaita-dark-theme-gray-rainbow-delimiters t "Use a gray color for rainbow-delimiters faces")
   :hook
   (user/after-daemon-make-initial-frame-functions . (lambda ()
                                                       (load-theme 'adwaita-dark :no-confirm))))