diff --git a/extensions-builtin/prompt-bracket-checker/javascript/prompt-bracket-checker.js b/extensions-builtin/prompt-bracket-checker/javascript/prompt-bracket-checker.js
index 41d384c77..3f3bebcda 100644
--- a/extensions-builtin/prompt-bracket-checker/javascript/prompt-bracket-checker.js
+++ b/extensions-builtin/prompt-bracket-checker/javascript/prompt-bracket-checker.js
@@ -88,7 +88,7 @@ function checkBrackets(evt) {
   if(counterElt.title != '') {
     counterElt.style = 'color: #FF5555;';
   } else {
-    counterElt.style = 'color: #55FF55;';
+    counterElt.style = 'color: #000;';
   }
 }