Re: Need help with some colour alterations.
In your #wrapper, you have 333333 (you need the #, like #333333). Then, in your #main, you need to add background-color: #222222;. That fixed it for me, locally. I think it will do the same for you.
You can also validate your CSS here to be certain you didn’t miss anything else:
http://bit.ly/FWxyD (it’s jut a link to the W3C site, but it’s a long URL.)
There are other places you forgot the hash # in front of 333333.