arcanechat-android/res/drawable/recipient_preference_scrim_bottom.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient
            android:angle="90"
            android:startColor="#3A000000"
            android:centerColor="#1D000000"
            android:endColor="@android:color/transparent"/>
</shape>