pure white background and more clear font

I am using this theme for my site www.happyrays.in. I like the theme. But I would like to have this theme, or any other theme with a pure white back ground and more clear font. In your all the theme background and font is little dim. For eg, Drupal.org, yahoo.com, google.com all have very bright background and very clear black font. Do you know any such theme. Is it possible to make this professional theme like that?