They may share the experience of being called "black" by people around them. Maybe not in their respective countries, as racial categories tend to change a lot based on society, however maybe if they were to meet in the same place. For example, many of my East African friends didn't realize they were "black" until they came to the US. Similarly, I felt more "white" when I was living in Tanzania as there were very few people who shared my skin tone, hair style, eye color, etc. So while I may not have had the same language as a Danish person in Tanzania, we shared a lot more physically than I did with some of the local Tanzanians and were often categorized the same by them anyways.
