In 1692, a Dutch artist by the name of A. Boogert created a book devoted to the process of mixing watercolors, and the myriad shades and tones he discovered in the process. The book, called Traité des couleurs servant à la peinture à l’eau, amounts to nearly 800 gorgeous handwritten and painted pages. We love imagining the artist pouring over his palette, an always-changing technicolor rainbow dotting its surace, day in and day out. Should you find yourself in Aix-en-Provence, France, we recommend stopping in at Bibliothèque Méjanes to marvel at Pantone's predecessor of nearly three centuries in person. Color us impressed.