title: kartik Select2 widget. How to change color of choices?
body: <p>I am curious how to change the hover color of choices in <code>kartik select2 widget</code>?<a href="https://i.stack.imgur.com/1OkFv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1OkFv.png" alt="enter image description here"></a></p>
  
  <p>I use <code>yii2</code>. My <code>app</code> renders following <code>code</code> for <code>dropdown</code> element of <code>select2</code>:</p>
  
  <pre><code>&lt;span class="dropdown-wrapper" aria-hidden="true"&gt;&lt;/span&gt;
  </code></pre>
  
  <p>But there is nothing inside it. So which classes are responsible for choices <code>hover</code> e.t.c?</p>