I spent about six months working on adding new pigments to my palette, and his research was invaluable. Highly recommended for anyone who is intermediate at watercolour. For beginners, he has a page that recommends some beginner palettes, which is quite useful.
mbivert|25 days ago
Two other similar resources on pigments − always good to check what's in the tube before buying!
https://www.kimcrick.com/pages/blue-art-supply-pigment-datab...
https://www.artiscreation.com/Color_index_names.html