Use 8dp for fab elevation

    <!-- Corner radius of the floating action button -->

    <dimen name="floating_action_button_radius">28dp</dimen>

    <!-- Z translation of the floating action button -->

    <dimen name="floating_action_button_translation_z">2dp</dimen>

    <dimen name="floating_action_button_translation_z">8dp</dimen>

    <!-- Padding to be applied to the bottom of lists to make space for the floating action

         button -->

    <dimen name="floating_action_button_list_bottom_padding">88dp</dimen>