This plugin has its own GUI has every color in the game. You can change your nickname color. If there are any problems with this plugin please comment down below and we will try to fix them.

COMMANDS: /colors

PERMISSIONS:
colornicknames.white
colornicknames.white colornicknames.gold colornicknames.lightpurple colornicknames.aqua colornicknames.yellow colornicknames.green colornicknames.black colornicknames.darkgray colornicknames.gray colornicknames.blue colornicknames.darkpurple colornicknames.darkblue colornicknames.red colornicknames.darkgreen colornicknames.darkred

UPDATE: Plugin has been tested and works perfectly fine.