OsmAnd/OsmAnd/res/drawable/wikipedia_select_lang_bg_light_n.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
       android:shape="rectangle">

    <solid android:color="@color/ctx_menu_buttons_bg_light" />

    <stroke
        android:width="1dp"
        android:color="@color/ctx_menu_info_divider_light" />

    <corners android:radius="3dp" />

</shape>