title: How to construct colour from byte array?
body: <p>Im struggling with very simple task (well, i think so). 
  I have <code>byte[4]</code> array that represents colour values like <code>byte[0] = alpha</code>, 
  <code>byte [1] = red</code> and so on. 
  How can I convert this byte array to an actual colour object?
  Thanks for an answer.</p>