Add an optional background to bundle.json to recommend an image behind the chat. Users see it by default and can replace or turn it off in Design → Chat.

Example

{
	"type": "midnight",
	"background": {
		"url": "https://example.com/wallpaper.png",
		"blur": 4,
		"opacity": 0.5
	}
}

Fields

The chat color is your theme's CHANNEL_BACKGROUND_DEFAULT. Unbound draws it at 1 - opacity over the image, so you don't make it transparent yourself.