在jquery中，哪个类更接近元素A或元素B

<div class='red'>
  <span class='orange'>
    <div class='green'>
      <div class="yellow">
         <p>who is closer to me red or green??</p>
      </div>
    </div>
  </span>
</div>
<div class='red'>
  <span class='orange'>
    <