I have the manufacturers.php add-on installed and the drop-down option selected. What I'd like to do is change the background color of the manufacturer (Designers) sidebox dropdown to match the site. Here's an example page:

PittiVintage

Using my FF web deveopers add-on to determine id & class, I've been throwing all these nifty css codes at it via the stylesheet but so far I got no love in return.

Any ideas? Thanks!!