title: How to extend dijit/ColorPalette with custom color (particular with transparent)
body: <p>I use standard <em>digit ColorPalette</em> in my widget. It is simple tool and it works fine.</p>
  
  <p>But I need to expand it with <em>transparent</em> or <em>none</em> color. I can deal with it in few ways:</p>
  
  <ol>
  <li>Add just a button near the Palette to clear the color</li>
  <li>Copy all code from <code>dijit/ColorPalette</code> to make custom Palette in my module</li>
  <li><strong>Extend</strong> the <code>dijit/ColorPalette</code> in my module only by one <code>none</code> color <em>(preferable way)</em></li>
  </ol>
  
  <p>Please point me how to extend <code>dijit/ColorPalette</code> or another way to implement <code>&lt;set_none_color&gt;</code> action if simple extending is imposible.</p>
  
  <p><em>I'm newbie in Dojo and i want to deal with it in right way.</em></p>