If you aren't up to date with the everpresent race-relations drama, recently there was there was a large storm around the (lack of) representation of "persons of color" in a game by Daniel Vavra called "Kingdom Come: Deliverance", starting in 1403. Vavra responded to complaints about lack of racial diversity by claiming that there wasn't a significant amount of black people in Bohemia during the time period.
The argument has been heated, so i think that this subreddit is the best place for me to get an accurate answer to my question:
Just how many "people of color" (whatever AskHistorians judges that to mean) would be in the kingdom during the time period (just before Hussite wars, it seems), and how likely would a person be to encounter one while wandering about the cities? How about the countryside?
First of all, it's important to understand that Europeans of the 1400s would NOT have understood race and ethnicity in a way at all resembling the modern notion of "people of color".
That said, there were some people in central Europe in the late middle ages that might arguably be considered "non-white" by 21st century standards. But these people would mostly have been what we today would "Middle-Eastern" looking, not West African features look that Americans today associate with "blackness". But non-Christian non-whites would haven been essentially unknown in Bohemia or Moravia. You might have found some Turkish or Arab merchants places further south or east, like in Vienna or Budapest, but I don't know how "black" they would be considered today.
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The only very very tiny possibility I can think of an actual black African person (what I suppose they mean with PoC) is that a high ranking Arab or Ottoman might had a eunuch among his servants. These eunuchs were often black Africans enslaved and then castrated to be used as low-rank guards and servants, though some reached high ranking positions within the Topkapı Palace.
Its a stretch but this is really the only possibility I can think of considering that we are talking about a time centuries before the European slave trade in Africa which even then was mostly concentrated in Western Europe and colonies in the American continent with most of Central Europe being out of the picture except for the Netherlands, meaning that even in this period a black African in Bohemia would have been quite a rare occurrence.
In fact if we were talking about Muslims the odds are those Muslims would be 'white' ones from the Balkans and not Arabs or Turks.