title: How can I remove a color from a button in Xamarin?
body: <p>In my C# I am changing to color of a button like this:</p>
  
  <pre><code>aButton.BackgroundColor = Color.FromHex("#e9e9e9");
  </code></pre>
  
  <p>Is there a way to remove this color. I know I could set it back to the color it was before but wondering if there is a way to just remove whatever was assigned?</p>