Knowledge: The color black is the most common and normal outfit for the people in Western Europe to wear. On the other hand, blonde hair is the norm in the west side of Europe.

Conversation:
I have brown hair that's so light that when you look at it under certain types of light, it looks blonde!
Interesting, do people mention how that's the second most common hair color?
I haven't but I don't quite like brown. Where is it most common in so I avoid them lol I want to stick out!
Well, the places that brown hair is quite common would be places such as Central and Eastern Europe, the US, and some Greater Middle East populations to name a few spots.
Ah okay, that's a shame as some of those places are where nice art is at. How about South Europe or West Europe?
Well it is common for people in Southern Europe and I'm unaware of how it is in Western Europe.
Hmm you don't know that brown hair is common in Western Europe. Then what's the most normal hair color?

Response: Ah, the most normal hair color in Western Europe is blonde.