title: How to change the color of custom svg icon in ionic 4?
body: <p>I want to change the color of a custom svg icon on clicking a button</p>
  
  <pre><code>&lt;ion-item&gt;
      &lt;ion-icon src="../../assets/img/icon-qr.svg"&gt;&lt;/ion-icon&gt;
      &lt;ion-label&gt;Qr Scan&lt;/ion-label&gt;
  &lt;/ion-item&gt;
  </code></pre>