Don't you just love the wide range of things you can customize with open source software. One of the things that some people really stick to is color schemes. Some like it light, others like it dark, even others like it pink :S.
Anyhow, whichever your preference is, it's nice to know you can change the color scheme of your favorite editor, vim. Just create the directory ~/.vim/colors and copy any color_scheme.vim file you find there (eg. tango, zen). Then restart vim and do a `:colorscheme name_of_color_scheme` or in gvim go to the edit->color scheme->name of color scheme menu. You can also add `colorscheme name_of_color_scheme` into your ~/.vimrc file to make it a permanent change everytime vim loads.