[BUG] Hex colours and chat perfixes

[NFLD99]

Before open an issue, checkout this steps:

• If you are running the plugin at first time, try to run again to see if the problem persists.
• Check if your build is the latest on our Jenkins. Click Here: http://host.areaz12server.net.br:8081/job/UltimateChat
• Its important to you include the plugin jar name, because version and build info.

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:
Install Uchat
Have a group with a prefix starting with a hex colour

Expected behavior
the colour applys

Screenshots and LOGs
https://uploads.nfld99.com/49Nz0H7ps4.png
1st bracket in admin is ment to match the closing one

Server and plugins versions (please complete the following information):

• Server: Paper 1.16.5
• Plugin Version: UltimateChat-1.9.1-b293-Universal.jar
• Java Version: Java 11

Additional context
No Console errors