Thanks to crazymcgee, I think my cheat-sheet on slave coloring's is now accurate, thought I'd share.
If a 'body part' isn't stated, then it will be the same as the human defaults.
Human
Skin: Pale, Fair, Olive, Tan
Eyes: Blue, Green, Brown, Hazel, Black, Gray
Hair: Blond, Red, Auburn, Brown, Black
(Exact same for Gnome, Seraph, Demon, Taurus, Centaur)
Elf/Harpy
Hair: White, Green, Purple, Blue, Blond, Red, Auburn
Dark Elf
Skin: Tan, Brown, Dark
Eyes: Blue, Green, Amber, Red, Purple
Hair: White, Green, Purple, Blue, Blond, Red, Auburn
Drow
Skin: Blue, Purple, Pale blue
Hair: White, Green, Purple, Blue, Blond, Red, Auburn
Orc/Goblin
Skin: Green
Fairy
Eyes: Blue, Green, Amber, Red, Purple
Hair: White, Green, Purple, Blue, Blond, Red, Auburn
Dryad
Skin: Green
Hair: Green, Purple
Dragonkin
Eyes: Amber, Red, Brown
Hair: White, Green, Purple, Blue, Blond, Red, Auburn
Slime
Skin: Jelly
Hair: Jelly
Lamia/Arachna
Eyes: Blue, Green, Amber, Red
Hair: White, Green, Purple, Blue, Blond, Red, Auburn
Nereid
Skin: Teal, Blue, Pale blue
Eyes: Amber, Red, Turquoise
Scylla
Eyes: Blue, Green, Amber, Red
Cat
Eyes:Blue, Green, Amber, Red
Fur: White, Gray, Orange-white, Black-white, Black-gray, Black
Fox
Eyes:Blue, Green, Amber, Red
Fur: Black-white, Orange
Wolf
Eyes:Blue, Green, Amber, Red
Fur: Gray, Black-gray, Brown
Bunny
Eyes:Blue, Green, Amber, Red
Fur: White, Gray
Tanuki
Eyes:Blue, Green, Amber, Red
Fur: Black-gray
I'm not that picky when it comes to descriptions while playing the game. But will be trying to make future portrait packs more 'accurate'.
(Note: if your starting slave's normal skin range is "Pale, Fair, Olive, Tan" then they can additionally have brown or dark skin by default)