What do the colours of provinces mean?

[Vitmore The Great]

Hello, I just got EU today. I really want to know the significance of the various colours of provinces that I own. Thanks.


Vitmore

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"We should not go out and conquer the people, but give them no other choice in their minds but to be conquered." - Me

[Zkribbler]

The type of terrain. Watch, in winter some/all of them will turn white with snow.

[weird god]

the terrain effects your units speed and combat results. more details in your manual