<android.support.design.widget.FloatingActionButton
android:layout_width="56dp"
android:layout_height="56dp"
//ripple
android:clickable="true"
android:focusable="true"
app:rippleColor="@color/fancy_blue"
//change color, use app: not android:
app:backgroundTint="@color/light_white"
//elevation
app:elevation="4dp"
app:pressedTranslationZ="12dp"
app:srcCompat="@drawable/ic_plus"
/>