title: Python Turtle pen colour
body: <p>When I call <code>t.pencolor('83, 58, 27')</code> (turtle is imported as t) I get the <code>TurtleGraphicsError: bad color string: 83, 58, 27</code> even though I have (I think) changed my colour mode.</p>
  
  <pre><code>t.colormode(255)    
  t.pencolor('83, 58, 27')
  </code></pre>
  
  <p>I run python 2.7 on OS 10.9</p>