Automatically change the color scheme in the regular expression for buffer name.
setup in your vimrc
e.g.)
let g:auto_colorscheme_default = 'default'
let g:auto_colorscheme_config = [
\ ['^\\\\win-file-server\\', 'desert'],
\ ['^/Users/ore/works/myproject/trunk/', 'blue'],
\ ['^/Users/ore/works/myproject/', 'evening'],
\ ]