title: Change background color if something is added to cart
body: <p>I want to write some code to where that when nothing (0) is added to the cart the icon is a light grey, but when something is added to the cart it changes to red.</p>
  
  <pre><code>&lt;span class="cart-item-number"&gt;1&lt;/span&gt;
  </code></pre>
  
  <p>How would I change the color if the cart is greater than or equal to 1? Would I use JQuery or PHP to do this?</p>