Yes, the terms ‘white’ & ‘black’ as we use them in the political/ post-TAST racial sense are anachronisms. But in terms of actual skin colour, ‘black’ is far more accurate than ‘white’ to describe ancient Egyptians. Their hues were well within the range of other Africans, both back then and today, and they saw themselves as completely distinct from ‘white’ people to the west and north of them. Modern Egyptians (especially in Lower, aka. north Egypt) are a different matter as they’re a different people.
And just a very few examples of how Kemetics (ancient Egyptians) depicted themselves: