I think this is a cool idea.

I'd want to take it further by using full RGB and cycling through some colormaps with different properties. Sequential, diverging, cyclic like in matplotlib.

https://matplotlib.org/stable/users/explain/colors/colormaps...

Can't think of a specific use-case off the top of my head, but sometimes I just want the "feel" of the data when I'm plotting something, and maybe the same scattershot approach would pay off at some point on unknown hex data if it was an option.