title: apply background color to gaps between grid
body: <p>I am trying to give a background color to the gaps between the boxes / grids. Here is my code:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.box {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
  }
  
  .box {
    grid-gap: 10px;
    background-color: grey;
  }
  
  .box div {
    border: 1px solid #444;
    min-height: 100px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="box"&gt;
    &lt;div&gt;One&lt;/div&gt;
    &lt;div&gt;Two&lt;/div&gt;
    &lt;div&gt;Three&lt;/div&gt;
    &lt;div&gt;Four&lt;/div&gt;
    &lt;div&gt;Seven&lt;/div&gt;
    &lt;div&gt;Eight&lt;/div&gt;
    &lt;div&gt;Ten&lt;/div&gt;
    &lt;div&gt;Eleven&lt;/div&gt;
    &lt;div&gt;Twelve&lt;/div&gt;
    &lt;div&gt;thirteen&lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Can someone suggest what is the right way to do it?</p>