Change background color of ion-item on click

Ionic Framework ionic-v3
1

hi, how i can change the background-color when i click on an ion-item?

my code:

     <ion-item (click)="openDetail(variant)">
          {{variant.ProductVariantName}}
          <ion-button slot="end" [hidden]="variant.ProductVariantValue.length==0" fill="clear" color="dark">
            <i [class]="variant.showDetail ? 'fa fa-arrow-up fa-lg':'fa fa-arrow-down fa-lg'"></i>
          </ion-button>
        </ion-item>