title: How do I change the background color of the ActionBar in the new MaterialComponents
body: <p>I'm using the new <a href="https://github.com/material-components/material-components-android" rel="noreferrer">MaterialComponents</a> and my app theme is:</p>
  
  <pre><code>&lt;style name="AppTheme" parent="Theme.MaterialComponents.Light"&gt;
      &lt;item name="colorPrimary"&gt;@color/primaryColor&lt;/item&gt;
      &lt;item name="colorPrimaryDark"&gt;@color/primaryDarkColor&lt;/item&gt;
      &lt;item name="colorAccent"&gt;@color/secondaryColor&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>how to change the background color of ActionBar </p>
  
  <p>I know about <a href="https://stackoverflow.com/questions/8024706/how-do-i-change-the-background-color-of-the-actionbar-of-an-actionbaractivity-us">this question</a> but it's outdated and doesn't use <code>MaterialComponents</code></p>
  
  <p>I don't want to add Toolbar to every screen just to change the background color.</p>