An effort to describe the diversity of birds led to one of the first modern color systems. Published by Smithsonian ornithologist Robert Ridgway in 1886, A Nomenclature of Colors for Naturalists categorizes 186 colors alongside diagrams of birds. In 1912, Ridgway self-published an expanded version for a broader audience — Color Standards and Color Nomenclature — that included 1,115 colors. Some referenced birds, like “Warbler Green” and “Jay Blue,” while others corresponded to nature, as in “Bone Brown” and “Storm Gray.”
Color systems date back centuries, at least to Richard Waller’s 1686 Tabula colorum physiologica. Yet bird-watching hones a sharp eye for color differentiation, so Ridgway had an edge — as well as a drive for perfection enabled by 19th-century synthetic dye advancements. This new color technology wasn’t without its dangers. One sample in Ridgway’s book is labeled “Scheele’s Green,” a reference to Wilhelm Scheele’s toxic mix of arsenic and copper.