title: how to change css when ng-select is used?
body: <p>I am currently using ng-select for drop down like</p>
  
  <pre><code>&lt;ng-select [items]="tests"
             (data)="signalChanged($event)"
             [active]="test"
             id="test)"&gt;
  &lt;/ng-select&gt;
  </code></pre>
  
  <p>I want to change the back ground color of the active element in the drop down list. How do I access it's css?</p>