title: Change the color of the selected TabItem footer
body: <p>I cannot change the color of the bottom of the selected tab (<code>TabItem</code>) on the <code>TabControl</code>. I need to change from light blue to dark blue as at the top.</p>
  
  <p>I'm using Firemonkey for Android and Delphi XE6.</p>
  
  <p><img src="https://i.stack.imgur.com/welNG.jpg" alt="enter image description here"></p>