title: How to convert UIColor to Hexadecimal (web color text string)?
body: <p>Is there an easy way to convert <code>UIColor</code> to a hexadecimal value ?<br>
  Or do we have to get the RGB components with <code>CGColorGetComponents</code> and then work it out from there?</p>
  
  <p>e.g <code>CGColorGetComponents(color.CGColor)[0] * 256</code> ?</p>