title: How to support Dark mode launch screen in iOS 13 with custom color?
body: <p>I am working on adapting my existing iOS 11+ app to the new Dark Mode in iOS 13. Using dynamic / named colors works without any problem to switch between been normal and dark appearance, except on the apps launch screen.</p>
  
  <ul>
  <li>A simple <code>XIB</code> file is selected as launch image in the target settings</li>
  <li>The launch screen works without any problem, except that the background color is not adapted to normal / dark mode.</li>
  <li>The launch screen uses a dynamic / named color as background color. Lets say <strong>green</strong> is selected for <code>Any appearance</code> and <strong>red</strong> for "Dark appearance". No matter if the devices is setup to use normal or dark mode the launch screen always shows <code>Any appearance</code> color (green). </li>
  <li>If the <code>Any appearance</code> color is set to some other value, e.g. yellow, the launch screen will appear in this color <strong>==> The background color is setup correctly</strong> </li>
  <li>Toggeling the interface style in Interface Builder shows the correct result <strong>==> The background color is setup correctly</strong> </li>
  <li>Using the same dynamic color in other places within the app (e.g. on the first view controller) works without any problem <strong>==> The color is setup properly</strong></li>
  <li>Using a <strong>build in dynamic color</strong> like <code>System Background Color</code> works without any problem (white background in normal mode and black background in Dark Mode)</li>
  <li>Using dynamic <strong>background image</strong> instead (as proposed in some other threads) has exactly the same problem (only shows normal appearance color). </li>
  </ul>
  
  <p><strong>So, how to get the launch screen to properly work with Dark mode?</strong></p>