those skintones were made a while ago for my half vampire sim. She's Vladislaus Straud's daughter (pls dont ask) but her second father was a human. So the supernatural skintone must've had human undertones.
mod has three tones: neutral, warm and extra cold. here's the placement of them

I don't know why they are placed like that, the program for skintone creation confused me so much and I'm not coming back
maybe it will be useful for someone <3
credits: obscurussims skin, eyes