Does this have anything to do with the voivodeship of Pomerania (Pomorskie)?
pomarańczowy= kolor pomarańczy orange= colour of fruit-orange
name of fruit according to wikipedia came from old italian pomarancia
and Pomerania in polish is Pomorze?
I've also heard about the alternative ethymology, where it was made by combining Italian words "pome" and "arancio".
Oh, now I see. It's like "pomidor". "Pomarancia" sounds like "apple-orange" to my ears, and "apple" used to refer to all kinds of fruit.
Many fruits and vegetables were introduced or made more popular in polish court by Queen (consort) Bona who was Italian.
Perhaps it needs some time to apply. Yeah, I see a report for "that tiger is orange" from 26 minutes ago, and the report is green (which means that this is an accepted answer). Normally the reports turn green on my eyes when I add a new accepted answer.