case 0x0181:
                        // Fill : fillColor
                        //@link : http://msdn.microsoft.com/en-us/library/dd921332(v=office.12).aspx
                        $strColor = str_pad(dechex(($opt['op'] >> 0) & bindec('11111111')), 2, '0', STR_PAD_LEFT);
                        $strColor .= str_pad(dechex(($opt['op'] >> 8) & bindec('11111111')), 2, '0', STR_PAD_LEFT);