Well, remember the porcelain doll skin? How it was mostly one color but had another shade creeping in and suffusing the joints and some other areas?
What if there were a skin like that, with a single base shade and then the color palette was that secondary color?
I suppose you're right though, they're pretty much a premium item. I do wish we had more base skin tones available, but making them be a

item makes sense.
Flowering vine for the win!
The Vinerys hair is the one with the sad eyebrows, right? Or did I mix it up?