arcanechat-android/res/drawable/floating_mini_bg_light.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
       android:shape="oval">
    <!-- read issue: https://github.com/deltachat/deltachat-android/issues/480 before introducing an attr here. -->
    <solid android:color="@color/white" />
</shape>