What stylevar changes the post background?

[setishock]

Add this to your additional.css>

.postbit .postbody {
	clear: both;
	color: {vb:stylevar postbit_color};
background: Your color goes here;
}

You can make the background an image if you like by making the background statement look like this (somewhat...) >

background: url(path/to/your/image);