Polish bureaucracy is still based on braindead communist dinosaur idiocy. Reason it stands like that and only that is because someone has not bothered to update it. This is very typical unfortunately in Poland in all bureaucracy. Eye colour categories should have brązowe, ciemnobrązowe (and not czarne), piwne, bursztynowe, zielone, niebieskie and szare, not what some "expert" thought up in times thankfully gone.
About blue rim, I don't know how to explain it. I think it is common in most more Northern Europeans (or descended from them), because something like this I have seen in Germans, Dutch, Russians, British, South African (Dutch and British descent) and other peoples from North as well. I am sure it is also common among Americans who are descended from Irish, Scottish, English, German and even French origins.