title: solarized dark for vim and incorrect background color with xterm terminal emulator, black instead of darkblue
body: <p>Following is my configuration for solarized colorscheme.</p>
  
  <p><code>let g:solarized_termcolors=256
   set t_Co=256
   set background=dark
   colorscheme solarized</code></p>
  
  <p>But the background color is not dark blue, but dark or grey, similar like that.</p>
  
  <p>I have tried remove <code>let g:solarized_termcolors=256</code>, remove <code>set t_Co=256</code>, add <code>let g:solarized_termcolors=16</code> or add <code>set t_Co=16</code>. But still display the wrong background color.</p>
  
  <p>How can I do any config to change that incorrect background color to darkblue ?</p>