I picked this book up after learning that languages all develop words for color in roughly the same order (and that that explains why some of the language around blood in the Talmud is so weird).
It ended up being an adventure into color and art with a little bit of science and a lot of art and cultural history.
Watching Fox walk the line with white, in particular, between explaining how white as race came to be while still focusing on the color itself rather than the concept was very interesting. I don't think he was perfect, but it was so much better than it could have been and overall he handled it well.
Purple was way more fun, and the entire book was just a great example of a person sharing a ton of information about a topic they love and what's not to like about that?