diff --git a/src/wp-admin/css/code-editor.css b/src/wp-admin/css/code-editor.css
index 3c2f5e562f..c177a8b0cd 100644
--- a/src/wp-admin/css/code-editor.css
+++ b/src/wp-admin/css/code-editor.css
@@ -70,3 +70,7 @@
 .CodeMirror {
 	text-align: left;
 }
+
+.wrap .CodeMirror .CodeMirror-linenumber { 
+    color: #666; 
+}