title: How to create a "Color Circle" in PyQt?
body: <p>I would like to create a QWidget/QDialog that looks like this:    </p>
  
  <p><a href="https://i.stack.imgur.com/Gkkti.png" rel="nofollow noreferrer">Color Circle</a><br>
  or:<br>
  <a href="http://prntscr.com/jrl9ww" rel="nofollow noreferrer">Windows Color Picker</a></p>
  
  <p>I am aware of <code>QColorDialog</code>, but i do not want to use it.</p>