User blog:Curycoo/Wikia Placeholder

HI!! im the founder of the POTCO players WIki at http://www.potcoplayers.wikia.com, and i was wondering if anybody knew how to change the look of the placeholder using css. i contacted staff, and they told me that there might be a way using css, but that they didn't know, and that i should ask here. if you can help,please do! THANKS!