I would say that they were darker skinned (or one light and one darker). Then they would have the dna to be able to produce a variety of skin colors in their offspring.
Dark skinned people and light skinned people and people with medium skin are all just people. It doesn’t matter what color Adam and Eve’s skin was. He is no respector of persons.
The question was meant to be divisive as it has no bearing on the gift of salvation.