For anyone that is really determined to change the colors, all you need is a little bit of css knowledge and either Firefox or Opera.
For Firefox, install the Stylish extension.
https://addons.mozilla.org/en-US/firefox/addon/2108
You can use Firebug to help you figure out what needs to be styled.
https://addons.mozilla.org/en-US/firefox/addon/1843
Opera users can create their own css stylesheet, then right click while browsing the forum and choose Edit site preferences...
Then go to the display tab and browse to the location of your stylesheet under My Style Sheet.
Have fun.
