<?php

$meta['charturl'] = array('string');
$meta['fg'] = array('string', '_pattern' => '/^#[0-9a-f]{6}([0-9a-f][0-9a-f])?$/i');
$meta['bg'] = array('string', '_pattern' => '/^#[0-9a-f]{6}([0-9a-f][0-9a-f])?$/i');