Threema-Android-mirror/app/src/main/res/drawable/bubble_compose_dark_outline.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
	<item>
		<shape
			android:shape="rectangle">
			<corners android:radius="@dimen/edittext_bubble_border_radius"/>
			<padding
				android:bottom="@dimen/chat_bubble_border_padding"
				android:left="16dp"
				android:right="16dp"
				android:top="@dimen/chat_bubble_border_padding"/>
			<stroke android:color="@android:color/white" android:width="0.6dp" />
		</shape>
	</item>
</layer-list>