Already have, and yes I have low vision. There's no need to insult me or others who don't have perfect vision for a physical limitation we often can't control.
That should not be a reason to excuse bad design in any case. Paradox should be designing their games for accessibility be consider people with vision limitations when designing the game's interface, and that includes color schemes. Countries near or likely to be near each other need to having distinct enough colors to be able to tell apart immediately at a glance.