I'm using the default theme for now (may look at a slimmer theme later) but want to know how I can manually change the background colour on any of the section headings individually?
In your forumbit_depth1_cat template, find:
class="thead"
change to:
class="thead forum-{$forum['fid']}"
Then, in your global.css, you can add a class to style that forum:
.thead.forum-X {
// css here
}
Change the X to the ID of the forum.
Not got a test board to try this on at the moment, but should work