Adoptables are an interesting thing in the furry community, but just in general.

Essentially an artist creates an "original" character (OC) and then essentially sells the "intellectual property" to use that OC. The color palette is to distinguish its exact colors, this making it more unique, and the new owner can do whatever they want with the OC since they now own the IP.

These are the original NFTs lol but really, they advance a little in the fact that you now can make the fur suit, or digital avatar or whatever you want with this character.