Answered The board's background colour

Hey everyone,

This is not really a RS related question I guess, but I don't know where to put it then.
Anyways, I've been trying to make a signature for this forum. I set the background of my signature to black, but when I upload it, it obviously doesn't blend with the forum's color. So is there a special trick or something for this? If not, would anyone please be so kind to tell me the background color in either RGB or HTML.

Thanks.