function! DisplayColorSchemes()
   let currDir = getcwd()
   exec "cd $VIMRUNTIME/colors"
   for myCol in split(glob("*"), 'n')
      if myCol =~ '.vim'
         let mycol = substitute(myCol, '.vim', '', '')
         exec "colorscheme " . mycol
         exec "redraw!"
         echo "colorscheme = ". myCol
         sleep 2
      endif
   endfor
   exec "cd " . currDir
endfunction

" Returns the list of available color schemes
function! GetColorSchemes()
   return uniq(sort(map(
     globpath(&runtimepath, "colors/*.vim", 0, 1),
     'fnamemodify(v:val, ":t:r")'
   )))
endfunction

let s:schemes = GetColorSchemes()
if index(s:schemes, 'solarized') >= 0
   colorscheme solarized
elseif index(s:schemes, 'darkblue') >= 0
   colorscheme darkblue
endif

set wildmenu
set wildmode=list:full
set wildcharm=<C-z>
let mapleader=','
nnoremap <leader>c :colorscheme <C-z><S-Tab>

blue.vim
darkblue.vim
default.vim
delek.vim
desert.vim
elflord.vim
evening.vim
industry.vim
koehler.vim
morning.vim
murphy.vim
pablo.vim
peachpuff.vim
ron.vim
shine.vim
slate.vim
torte.vim
zellner.vim