I’ve found no better book on understanding colors than Color by Betty Edwards: A Course in Mastering the Art of Mixing Colors
I’ll add that art making isn’t just reading to gather head knowledge — you must work through the steps. Sounds like a great Father/son activity!
Color by Betty Edwards: A Course in Mastering the Art of Mixing Colors
This book can maybe help, it contains a nice "formula" for mixing and decoding color. I've read through several chapters, and as an amateur artist myself, found it interesting and memorable. Good luck with everything!
This book is a pretty amazing primer on color theory. I have found it very helpful with my painting.
https://www.amazon.com/Color-Betty-Edwards-Course-Mastering/dp/1585422193
Color by Betty Edwards is a great one on color theory. Doesnt deal directly with makeup but it's extremely useful and Making faces or anything by Kevyn Aucoin