Groups CSS?

[silverado350]

Where can I change the background color in the Groups forum? This pic is from the EXPERTZZ site because mine has no content yet. I think I found the correct class... tbl_p_msg but I don't see any place to set the background color

[silverado350]

I still cant find this. I need to change the forum/groups background from white to black? Below you can see what I am talking about. Fire bug shows

element.style {
background-color:transparent;
height:38px;

but won't tell me where I can find it. Anyone know how to do this?

[silverado350]

I found it. Its in /layout/uni/xsl/forum_posts.xls @ line 91 and 123