title: Can I add background color only for padding?
body: <p>I have a header box including border and padding and background color for that box,
  can I change the background color only for the padded region after the border and then the same background color for the rest of the width (i.e. grey in the given code)?</p>
  
  <p>Just a pinch of the code where I want the padded background color:</p>
  
  <pre><code>nav {
      margin:0px auto;
      width:100%;
      height:50px;
      background-color:grey;
      float:left;
      padding:10px;
      border:2px solid red;
  }
  </code></pre>