title: Python String to triplet color
body: <p>Hov can I make a string triplet to a RGB color? Like this:</p>
  
  <pre><code>color = "255,255,255"
  background.fill((color))
  </code></pre>
  
  <p>This code gives me "invalid color argument".
  Why I want to do it this way? This string is saved in a file.</p>