title: How to fix a background-color?
body: <p>My question, can seem very dumb. But it's not, even I think so. </p>
  
  <p>I've got a gradient on my background-color to make an effect on the background-image which is under it with position fixed.</p>
  
  <pre><code>body{
    background-image:url(...);
    background-attachment: fixed;
  }
  
  body:after{
    content: "";
    display: block;
    background-attachment: fixed;
    position: absolute;
    height: 100%;
    width: 100%;
    background: -moz-linear-gradient(-45deg, rgba(30,87,153,1) 0%, rgba(89,148,202,1) 62%,     rgba(95,154,207,0.7) 68%, rgba(125,185,232,0) 100%);
  }`
  </code></pre>
  
  <p>I hope, I've been precise enough. If you need more information, don't hesitate.</p>
  
  <p>Thank you !</p>