Color changing not allowed in the theme options

Could you point me in the right direction?
The main things i would like to change on my site…
http://rollingthunderairsoft.com/
Are
1. On the front page, the backgrounds of the posts, and widgets are white, i would like to change that.
2. The details of the forums, and the Copy write footer information. (from grey to probably black)
3. The grey texts on the contact page, too black.
4.the http://rollingthunderairsoft.com/media/ page, look at the category text, it needs to be black also.