WordPress/src/main/res/drawable/stats_pager_button_white.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
        <shape android:shape="rectangle">
            <corners android:radius="@dimen/stats_button_corner_radius" />
            <solid android:color="@color/grey_light" />
        </shape>
    </item>

    <item android:top="2dp" android:bottom="2dp" android:left="2dp" android:right="2dp">
        <shape android:shape="rectangle">
            <corners android:radius="@dimen/stats_button_corner_radius" />
            <solid android:color="@color/white"/>
        </shape>
    </item>
</layer-list>