Add hex support for chat messages

[Katakalysm]

Is your feature request related to a problem? Please describe.
Yes, the problem is with certain plugins (specifically slimefun) use custom hex colors that end up causing the item to have the color of whichever is the last hex value of that chain, for example:

This item should look like this in game:

But in the shop it looks like:

Therefore it only takes &0 and turns the whole item black, which can be a little problematic with visibility, and players have continuously complained about this issue.

Describe the solution you'd like
Add hex support for chatConfig.yml or any yml file would likely be desirable.

Describe alternatives you've considered
Honestly, the only viable option for us is to reuse entirely different colors that might be slightly tweaked, but otherwise I can't think of anything else that could work as an alternative for this particular plugin

Additional context
Most of the context was given above, I'm very willing to cooperate and negotiate if at all possible, and greatly appreciate if you would consider this request, your plugin is great would love if you could help us out