Genealogy / Perception of hair color in Poland [14]

I used to work with in Iceland a Polish woman, and she kept calling low-saturation blondes (aka ash blonde) "brún" - Icelandic word for "brown", or German word for the "Icelandic race". It was really a creepy matter, because she was calling people by their pseudoscience race, and apparently it was not intended.

Now I'm quite concerned. From my experience, almost all Poles are brown-eyed blondes - and people around say that the most popular hair color is brown.

And that was not enough - every hair color, except black, they'll call "the typical Slavic hair". Whether it'S blonde, brown, whatever the shade is. They'll argue that Scandinavians have more "colder colors". Which I wouldn't agree, because Scandinavians actually have some reddish shades due to Keltic admixture.

So, why that? Is there some sort of "colorblindness gene" in Polish DNA?