protected function _rgbToString($rgbArray) { if (version_compare(Mage::getVersion(), '1.4.0.1') > 0) { return parent::_rgbToString($rgbArray); } else { $result = array(); foreach ($rgbArray as $value) { if (null === $value) { $result[] = 'null'; } else { $result[] = sprintf('%02s', dechex($value)); } } return implode($result); } }