title: how to display ion-item in ion-row with alternate color in it?
body: <pre><code>&lt;ion-row   *ngFor="let box of Boxes"   &gt;
    &lt;ion-col col-9&gt;
    &lt;ion-item  &gt;
    {{box}}
    &lt;/ion-item&gt;
    &lt;/ion-col&gt;
    &lt;ion-col col-3&gt;
        &lt;ion-checkbox&gt;&lt;/ion-checkbox&gt;
    &lt;/ion-col&gt;
  
  &lt;/ion-row&gt;
  </code></pre>
  
  <p>How to display item in alternate color ? alternate color for every  row item.?</p>