HEX code displayed differently in IE and FFox


i’m working on a site for the department i work for at the university of colorado.

please view the following site:

in FFox, the background color matches the images because i copied the hex code from photoshop.

in IE however, the color doesn’t match, and just looks terrible. anyone know what’s going on there?

also, i haven’t had a chance to look at it on a mac, so can some mac users tell me if the color matching problem is happening on safari, ie mac, and firefox mac?