title: Material: Navigation bar elevation or shadow
body: <p>Setting the navigation bar color to something other than black only plays well with material design if you set it to transparent (or the same color as the window background) and the content is not scrollable.</p>
  
  <pre><code>&lt;item name="android:navigationBarColor"&gt;@android:color/transparent&lt;/item&gt;
  </code></pre>
  
  <p>If the navigation bar has another color or if the content is scrollable, the ink just gets cut off when reaching the bar like in the picture: </p>
  
  <p><img src="https://i.stack.imgur.com/oSmdk.jpg" alt="Ink disapearing"></p>
  
  <p>I would like to set an elevation on the navigation bar so that it casts a shadow and it becomes clear that it's another layer. Is this possible?</p>