title: changing color of <md-toolbar>?
body: <p>This is how my code looks like on <a href="http://codepen.io/harit/pen/KdxJzJ" rel="nofollow">CodePen</a>:</p>
  
  <p>I want the background of "<code>Sidenav Left</code>" to be that of "<code>Menu Items</code>", which is represented by class as  </p>
  
  <pre><code>.nav-theme {
    background-color: #34495E
  }
  </code></pre>
  
  <p>I tried overriding it as  </p>
  
  <pre><code>.nav-theme, .md-theme-indigo {
    background-color: #34495E
  }
  </code></pre>
  
  <p>but that did not work, what do I need to do?</p>