diff --git a/lisp/progmodes/flymake.el b/lisp/progmodes/flymake.el
index 72acc3a9204..e8d5de6023c 100644
--- a/lisp/progmodes/flymake.el
+++ b/lisp/progmodes/flymake.el
@@ -182,7 +182,7 @@ verify FILTER, sort them by COMPARE (using KEY)."
 
 (defface flymake-warning
   '((((supports :underline (:style wave)))
-     :underline (:style wave :color "DarkOrange"))
+     :underline (:style wave :color "deep sky blue"))
     (t
      :inherit warning))
   "Face used for marking warning regions."