Long before the first Pantone Guide in 1963, an artist by the name of A. Boogert created a highly-detailed book about colors. You can see the book in its entirety here.
Spanning nearly 800 completely handwritten (and painted) pages, Traité des couleurs servant à la peinture à l’eau, was probably the most comprehensive guide to paint and color of its time. According to Medieval book historian Erik Kwakkel who translated part of the introduction, the color book was intended as an educational guide. The irony being there was only a single copy that was probably seen by very few eyes. [via]