Interracial couple kids only have tanned white skin colors after Dec patch.
I kind of understand how this happens with the new system (aka it picks a color between the color of each parent) because when I went to make a new interracial couple in CAS (after the new patch) with...
Fingers crossed they will update the genetics in the near future. I think they were so hyper-focused on getting the tones right they forgot about the genetics.