Looking at the genetic variations of skin colour.

1. Skin Colour is just a slight genetic variation within the DNA.
We are all actually the same colour just a different shades of
that colour. We all have the same pigment of skin which is
called melanin. This is a basic brown colour. Some people
have lots of melanin which results in a dark coloured skin and
others have little melanin which results in very light coloured
skin

2. Now genese come in pairs and we get half from each
parent.

3. AB = Large Amount of Melanine ab = Small amount of Melanine
AABBB
Dark Skinned
aabb
Light
Skinned
AaBb
Middle
Skinned

4. Father Mother
AaBb AaBb
Possible Combinations
Sperm Egg
ab ab
aB aB
Ba Ba
AB AB
Possible offspring variations
AABB AbAB aBAB abAB ABAb AbAb aBAb abAb ABaB
AbaB aBaB abaB ABab Abab aBab abab
Adam and Eve would of had to been middle-brown skinned. Their offspring would of been light, dark and all
shades in between.