Issue with adding provinces

[Arthyn]

I am trying to create a custom map with its own provinces, but the game crashes every time. After some testing I figured out that the problem solely lies with the new province. I was using colours from the basegames province map to avoid doubling anything since I can't figure out how to make a system for that so I assume that is the problem.
I was wondering if anyone knows how to make this work and if anyone could tell me where I can find the file that allocates RGB colours to provinces so I may fiddle with that.

 

[otaman1]

There's a file called definition.csv. It lists all the RGB for each cities. Use different RGB for each city