I lost my save, so I haven't fully explored 73.0 yet, so forgive my ignorance if this is in fact already a thing, but I'm hoping we eventually get darker unusually-coloured skin tones (I think it'd be nice to be able to have parts of Newt's look, like the clawed hands, tan-coloured pale spots rather than white, more intense/dark tones like red). The reason I say so is partly since I think her design looks really nice, but I also like the idea of having more diversity available for customisation.
[Edit:] So, I'm coming back to this the next day after regaining access to the Shop o' Horrors, and having clicked on the relevant colour during the (re)customisation... Newt's scales are meant to be.. brown? They look like a deep red to me, but if you want a tail that looks like hers, the normal Lizard one (not Light) set to Brown is it.