title: PrimeNG Tooltip Inner Will not change color
body: <p>When modifying the ui-tooltip css it only changes the outer color of the tooltip, it still leaves an inner color. I also tried the CSS from jQuery UI which should make a black tooltip but again the inner color did not change.</p>
  
  <p>Does anyone have any experience with this?</p>
  
  <p><a href="https://www.primefaces.org/primeng/#/tooltip" rel="nofollow noreferrer">https://www.primefaces.org/primeng/#/tooltip</a></p>
  
  <pre><code>&lt;input type="text" pTooltip="Enter your username" tooltipPosition="top"&gt;
  </code></pre>
  
  <p>CSS:</p>
  
  <pre><code>.ui-tooltip {
      background-color: red
  }
  </code></pre>
  
  <p>Above just leaves a dark-grey block inside a red block.</p>