One reason I won't complain much about Dirk is this
Now, two things
1. Everyone with hair who has brown or a lighter variation of brown seem to have almost black hair, why? Idk, but I think it maybe due to 2k not wanting bad hair to be as blatantly obvious as black can mask bad texturing.
2. The lighting from that angle adds to the darkness as I see his beard is lighter in some spots.
Outside of that it looks just like Dirk structurally