Thanks Kh99 but I found the solution for it
Here's some examples:
http://www.webmastersun.com/forums/1...e-Optimization
http://www.webmastersun.com/forums/1...rnet-Marketing
http://www.webmastersun.com/forums/65-Facebook
....
I will be applied on forums and topics that I want to use exact colors for them.
I used color that relate to forums, i.e SEO then I used blue color and internet marketing then I used dark blue for it...etc
They looks better and I am applying on other sections.
Cheers,