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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.