title: Change navigation bar color
body: <p>I know it is possible since API 21 to change the color of the navigation bar. I have looked at the documentation of React Native but I can not find a way to do this.</p>
  
  <p>The only way I know is by creating a native module, but that does not seem like a good solution since I am using Expo.</p>
  
  <p>Is there a built-in way to do this?</p>