Admin Forum:How to change the Chat Theme?

I'm an admin on the http://kidicarus.wikia.com/wiki/IcarusPedia.

I was wondering how to change the theme of the chat like on the My Little Pony Wiki, here.=http://mlp.wikia.com/wiki/Special:Chat

They have two different themes and I wanted to do the same thing. One theme being 'sky like'. (There is a place called Skyworld in the video game of our wiki.)

The other one having an Underworld like theme. (The main villian army of the game.) I want them to be able to switch back and forth between the two.Captain Comet (talk) 14:44, August 2, 2012 (UTC)