Hey. Thanks for your review.
The plugin based on a api named 'adventure' and for "simple texts" you only need to write something. If you want to have a color you need to use "<COLOR>" or "<#HEXCODE>".
A example: "<green>This is a green text" or "<#12345>This is a text with the color from the hex code".
Here is the official documentation:
https://docs.adventure.kyori.net/minimessage/format.html
Kind regards
ByRaudy