From 5933f064fb81319206527734fe3d2b1365658ccf Mon Sep 17 00:00:00 2001
From: Sam Hemelryk <sam@moodle.com>
Date: Fri, 2 Jul 2010 06:23:19 +0000
Subject: [PATCH] admin MDL-23049 Fixed bug with colour picker admin setting
 and added support for empty values

---
 lib/adminlib.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/adminlib.php b/lib/adminlib.php
index a42016998fd..d6971734809 100644
--- a/lib/adminlib.php
+++ b/lib/adminlib.php
@@ -7312,8 +7312,10 @@ class admin_setting_configcolourpicker extends admin_setting {
                 $data = '#'.$data;
             }
             return $data;
-        } else if (preg_match('/^[a-zA-Z]{3, 25}$/')) {
+        } else if (preg_match('/^[a-zA-Z]{3, 25}$/', $data)) {
             return $data;
+        } else if (empty($data)) {
+            return null;
         } else {
             return false;
         }