title: PNG transparency in CSS
body: <p>I need to add transparency to the PNG that I'm using as background. How can I add transparency?</p>
  
  <pre><code>section#testimonials {
      height:  647px;
      background: url("../img/yellow_testimonial.png") repeat-x 0 0;
      padding: 0;
      color: #e4e5e2;
      z-index: 500;
      box-shadow: 0 0 16px rgba(0, 0, 0, 0.3);
      -moz-box-shadow: 0 0 16px rgba(0, 0, 0, 0.3);
      -webkit-box-shadow: 0 0 16px rgba(0, 0, 0, 0.3);
  }
  </code></pre>