As you can see, we went ahead and implemented section-specific color schemes around here. The goal is that they will aid navigation because, at a glance, you could see exactly where on the site you are.
It also lends itself to the idea that DaniWeb can be thought of as an umbrella site with five different mini-sites, each targeting a different audience.
Please let me know not ony what you think of the idea, but also what you think of the specific colors for each category. Thanks!