Who cares what the color is? One message type is E2E encrypted over Apple's infrastructure, and you can message while not on cell. The other is not E2E and may have carrier billing and whatever other restrictions on it.
Seriously I don't have the chops or time to do it, but creating a Pidgin wrapper around this tech would be awesome. Just for basic texts/emoticons, it helps a lot with Teams and WhatsApp chats already for me (along with the Pidgin notification extension for GNOME that pops up a box I can type a quick reply into wherever I am).
