Text editing without colors is boring.
In vim's command mode, the color scheme can be changed by issuing: colorscheme <color>

Below are the color schemes you can choose from.
cd /usr/share/vim/vimcurrent/colors
blue.vim      delek.vim    evening.vim  murphy.vim     ron.vim    torte.vim
darkblue.vim  desert.vim   koehler.vim  pablo.vim      shine.vim  zellner.vim
default.vim   elflord.vim  morning.vim  peachpuff.vim  slate.vim

To permanently enable your favorite colorscheme, add the following line to .vimrc
colorscheme yourfavoritecolor