/**
* Returns the colour style for use within CSS.
* Will return an optimised hash colour.
*
* e.g #123456
* #123 instead of #112233
* #F00 instead of red
*
* @param string $overridevalue If provided then this value will be used instead
* of the styles current value.
* @return string
*/
public function out($overridevalue = null)
{
if ($overridevalue === null) {
$overridevalue = $this->value;
}
return parent::out(self::shrink_value($overridevalue));
}
