title: How to change popup color?
body: <p>I want to change the color of the popup to <code>inverted</code>, I use this:</p>
  
  <pre><code>$('path').popup({
          on:"click",
          transition:'vertical flip',
          duration: 300,
      });
  </code></pre>
  
  <p>But I dident fount in the docs how to add the key to add <code>inverted</code>, because if I add it directly to the dom, it works, so how to do it inside the script?</p>