Forums / Cotonti / Support / Grup color Core hack how can do ?

How can i do Group color ? with functions.php core hack ?

For do this critic zone code.

function cot_build_user($id, $user, $extra_attrs = '')
{
	if (!$id)
	{
		return empty($user) ? '' : $user;
	}
	else
	{
		return empty($user) ? '?' : cot_rc_link(cot_url('users', 'm=details&id='.$id.'&u='.$user), $user, $extra_attrs);
	}
}

im thinking some magic touch enough , and i hope somena can do this :)