Name: Sphinx/ hairless mutation
Basically, lions that have no fur whatsoever. They would be bald and wrinkly like sphinx cats. They would still carry marking and base colours and genetics, but they would not be visible- instead, they would be the colour of their skin, e.g lilac would only be lilac coloured, clouded would be splotchy pinkish and black, echo would be swirly blackish blue, and well summer would be orangish with black speckles.
I don’t really have the motivation to draw a sketch of what I imagine they would look like, but I think this would be a really fun mutation.
This would be visible from birth, and shouldn’t be too hard (obviously would still take time and stuff) to implement as it doesn’t require any new base/marking shapes to be made, just the actual hairless base Lineart for various age stages, and a coloured base matching the skin colours.