Ir_brown.vim is a project mainly written in Vim Script, it's free.
A brown (technically grey, but it looks brown on my screen) version of ir_black for vim
ir_brown is my modified version of ir_black. It has a grey background, which I find less harsh on the eyes. It also swaps out a couple of the colours used for slightly more pleasing versions. Apart from that it is mostly the same.
I recommend using pathogen.vim:
cd ~/.vim/bundle
git clone git://github.com/lukerandall/ir_brown.vim.gitthen adding the following to your .vimrc
colorscheme ir_brown