title: How to change the background color of ion-header in ionic 2?
body: <p>How to change the header color? I tried below but didn't succeeded</p>
  
  <pre><code> &lt;ion-header&gt;
    &lt;ion-navbar danger&gt;
      &lt;ion-title&gt;TITLE&lt;/ion-title&gt;
    &lt;/ion-navbar&gt;
  &lt;/ion-header&gt;
  </code></pre>
  
  <p>My variable.scss is:</p>
  
  <pre><code>$colors: (
    primary:    #387ef5,
    secondary:  #32db64,
    danger:     #f53d3d,
    light:      #f4f4f4,
    dark:       #222
  );
  </code></pre>