title: How to remove grey shadow color below FloatingActionButton
body: <p>I am getting light grey color below the <code>FloatingActionButton</code> as shown in image. Any one know how to remove it. I tested it on Lollipop version.</p>
  
  <p><strong>My xml code</strong></p>
  
  <pre><code>&lt;android.support.design.widget.FloatingActionButton
      android:id="@+id/fab"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentBottom="true"
      android:layout_alignParentRight="true"
      android:src="@drawable/ic_add_black"
      app:borderWidth="0dp"
      app:fabSize="mini"
      app:rippleColor="@color/colorPrimaryDark" /&gt;
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/m55J9.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/m55J9.jpg" alt="Floating action button"></a></p>