title: How to get a Color from hexadecimal Color String
body: <p>I'd like to use a color from an hexa string such as <code>"#FFFF0000"</code> to (say) change the background color of a Layout.
  <code>Color.HSVToColor</code> looks like a winner but it takes a <code>float[]</code> as a parameter.</p>
  
  <p>Am I any close to the solution at all?</p>