I finally have a gene pool for my characters. (Specifically Victor and Chris)

So mothers side, white great grandfather, white great grandmother, white grandmother, white grandfather= white mother.
Fathers side-Black great grand mother , white great grandfather, black grandmother, black grandfather= black father (Who because of his grandfather carries a white gene and has blue eyes)

Therefore Victor has brown skin (Although being somewhat lighter than his fathers due to being mixed race) from his fathers side and his brown eyes from his mother.
Chris gets white skin (Although it's slightly more tan than hos mother since he is mixed race) and his blue eyes from his father.

I know this is boring but I am so happy to FINALLY have worked this out.