title: Changing Vim background color - and not text color
body: <p>I was hoping to see if I could change the background color of Vim, so that when I'm insert mode my background changes slightly. (my default is dark grey, i'm hoping to change to light grey).</p>
  
  <p>I was following some other SO posts I found, and tried</p>
  
  <pre><code>autocmd InsertEnter * hi Normal ctermbg=darkgrey
  autocmd InsertEnter * hi Normal ctermbg=none
  </code></pre>
  
  <p>That was slightly working, since it would change my background, but it also changed my text color too - I just want the background changed.</p>
  
  <p>I tried adding in ctermfg (foreground?)</p>
  
  <pre><code>autocmd InsertEnter * hi Normal ctermfg=none ctermbg=darkgrey
  autocmd InsertEnter * hi Normal ctermfg=none ctermbg=none
  </code></pre>
  
  <p>Still did not fix it.</p>
  
  <p>Pictures for reference:</p>
  
  <ol>
  <li><p>When I open up vi - Default colors - which I like - Command mode
  <a href="https://i.stack.imgur.com/orcoZ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/orcoZ.jpg" alt="When I open up vi - Default colors - which I like - Command mode"></a></p></li>
  <li><p>When I go into "insert" mode (background subtly changes (good!) text changes (not what I wanted)
  <a href="https://i.stack.imgur.com/66VaY.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/66VaY.jpg" alt="enter image description here"></a></p></li>
  <li><p>Escaping out of insert, back to "Command" mode
  <a href="https://i.stack.imgur.com/m4qxg.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/m4qxg.jpg" alt="enter image description here"></a></p></li>
  </ol>
  
  <p>I google'd some more, and found another SO post, that was explaining how the way ctermbg works, is it doesn't just change the background color, instead use</p>
  
  <pre><code>set background=
  </code></pre>
  
  <p>I tried that too:</p>
  
  <pre><code>autocmd InsertEnter * set background=dark
  autocmd InsertLeave * set background=light
  </code></pre>
  
  <p>It changes the font color and background color, but this time when I go back to command mode the font color is back to normal (along with the background).</p>
  
  <p>Is it possible, to just change the background color between 2 color (light grey and  dark grey) without affecting text color, going from Insert Mode to Command Mode?</p>