> The best way to reproduce the colors might be to follow Boogert’s recipes for the paint, which I think is what he documented?

That's back far enough that following the recipes is bound to be _hard_.

Chemicals and pigments and such go by different names, are produced in different processes and formulations, and some are extremely hard to get due to someone noticing that it rots your genes or whatever.

Maybe whatever pigments are used in watercolors aren't affected by this much, but I bet at least some are.

It'd should be fun to try though, for a certain kind of person.