Hi Vipul,
I've made some adjustments to the colour scheme, the problem you were referring to has been adjusted and is visible now, the site looks it's best on Firefox 4 with a high screen brightness, allows the colours to separate themselves properly.
Please tell me if you think further adjustment is needed, I am aware of a few changes that still need to be made, however I'm concentrating on more important aspects of the site first such as getting the V.I.P group set up, as well as the help documents.
Thank you for your feedback.