title: cannot add background color to Header/Footer in pdf
body: <p>I'm trying to customize the header and footer. But I cannot add the background color to the footer.
  This is what I'm trying to do.</p>
  
  <pre><code>page.pdf({
      path: 'test.pdf',
      format: 'a4',
      landscape: '!data.isPortrait',
      footerTemplate: '&lt;div class="footer" style="height:75px;position: absolute;top:auto;left:0px;right:0px;left:0px;background-color:red;"&gt;\ &lt;/div&gt;',
      displayHeaderFooter: true,
      margin: {
          top: "75px",
          bottom: "75px"
      }
  });
  </code></pre>
  
  <p><strong>environment</strong></p>
  
  <pre><code>Puppeteer version:1.1.0
  Platform / OS version:ubuntu 16.04
  Node.js version:8.9
  </code></pre>