title: How to tell which colorscheme a Vim session currently uses
body: <p>You can <em>set</em> the Vim color scheme by issuing</p>
  
  <pre><code>:colorscheme SCHEME_NAME
  </code></pre>
  
  <p>but, oddly enough, you can't get the currently used scheme by issuing</p>
  
  <pre><code>:colorscheme
  </code></pre>
  
  <p>as this results in "<code>E471: Argument required</code>". I also don't see the color scheme listed in the output of <code>:set</code>.</p>
  
  <p>So how do you go about figuring out the current color scheme in use (other than manually switching the themes until you recognize it)?</p>