title: Progress Bar Colors
body: <p>I need my <code>QProgressBar</code> to change color on specific values, such as </p>
  
  <ul>
  <li>0-60 Int portion : Green</li>
  <li>60-80 Int : Orange</li>
  <li>80-100 Int : Red</li>
  </ul>
  
  <p>but I can't find the solution. From style sheet the whole color of progress bar changes on values but not portion wise. </p>
  
  <p>I am using <code>QT creator 3.4.0</code> based on <code>QT 5.4.1</code>.</p>