It’s a European capital. Of course most people will be of European origin.

But for Vienna specifically, it has a sizable Turkish population as well (didn’t find a chart about ethnicity-based geographics). I also think (having visited it, but not having lived there, but a culturally similar capital) that while there are definitely some stereotype issues, it is definitely less pronounced in capitals where people actually can occasionally meet with people of color (certain ethnicities are extremely rare in this part of Europe) - but I can’t answer it any more than that.