The ultimate chat solution. Prevent spam, ads, swears and even bots on your server. Replaced by ChatControl Red: https://mineacademy.org/chatcontrol-red
Thanks, I believe to have accepted you now. Red has support for that if you give players the right permissions which is described in Colors section in settings.yml
How could I have players talk using RGB colors?
I believe it is not possible yet.
Also, I have filled out the Pro -> Red, would love to try it out and become a beta tester for future features but haven't gotten a reply.