Board Thread:Support Requests - Designing Your Wikia/@comment-25483420-20151110210422

I've recently created a wikia and I am slowly building it up. However I don't know how to add a chat background. I've asked Community Central (and another chat) but there was no reply. Also, how do you change the transparency of it? I want it about 33% transparent (100% would make the text unreadable) 