You mean color code? You must be diamond rank or above to access this perk! To talk in minecraft colors you need to know its color code! You can have a look at this guide: https://mccentral.org/community/threads/guide-how-to-type-color-chats-in-color-text.24569/ Another helpful guide: https://mccentral.org/community/threads/how-to-write-in-colours-chat-and-signs.97/ I hope this information could help you out! ~Cya!
