Werner's Nomenclature of Colors. Color guidebook from 1821.
Wada Sanzō's dictionary of color combinations, from the founder of the Japan Color Research Laboratory. Source on Github.
Pantone Colors of the Year
2018: Ultraviolet. [Source: The 2018 Pantone color of the year is definitely not purple]
2017: Greenery. [Source: Pantone hopes its color of the year will improve our gloomy mood]