title: cssClass for ActionSheetController ionic 3
body: <p>In my ionic 3 app ActionSheetController I have added buttons with icons. I am trying to modify the style by giving the icons color.</p>
  
  <pre><code>let actionSheet = this.actionSheetCtrl.create({
        title: 'Upload Photo',
        cssClass: 'asheet'
        buttons: [
          {
            cssClass: 'button-cam'
            icon: 'camera',
            text: 'Take Picture',
            handler: () =&gt; {
              this.openCamera(from);
            }
          }, {
            icon: 'image',
            text: 'Photo Galary',
            handler: () =&gt; {
              this.openGalary(from);
            }
          }
          , {
            icon: 'close',
            text: 'Cancel',
            role: 'cancel',
            handler: () =&gt; {
              console.log('Cancel clicked');
            }
          }
        ]
      });
  </code></pre>
  
  <p>Now I have added the two classes in my .scss files of the page.</p>
  
  <pre><code>.asheet{
   background: red;
  }
  
  
  .button-cam{
    background: red;
    icon{
      color: blue;
     }
    }
  </code></pre>
  
  <p>None of the styles are reflecting in the action sheet. Everything is black.</p>