title: How do I change the footer background color in css?
body: <p>I am having trouble changing the footer background colour in my CSS doc. </p>
  
  <pre><code>footer{ background-color: lightblue; text-align: center; } 
  </code></pre>
  
  <p>I also can't change the aside background color. </p>
  
  <pre><code>aside{ background-color: lightgray; }
  </code></pre>
  
  <p>I would really appreciate the help. </p>