Ridgway's Color Standards
1,115 named colors on 53 plates, published in Washington by the ornithologist Robert Ridgway so that naturalists could describe birds, plants and minerals in exactly the same terms. Each color is placed by hue, tone and degree of greyness.
About these colors
Color Standards and Color Nomenclature was published in Washington in 1912 by the ornithologist Robert Ridgway (1850–1929). Its 53 plates hold 1,115 named colors, each placed by hue number, by tint or shade (the letters b, d, f for paler tints and i, k, m for darker shades), and by the primes after the hue number that mark how much neutral grey was added. The book is in the public domain.
Hex values are the dominant color of each swatch in the Project Gutenberg edition, so they approximate a century-old printed copy rather than Ridgway's original pigments. They come from davo/Color-Standards-and-Color-Nomenclature (MIT License). Indulin Blue and Neutral Gray, which that dataset sampled from neighbouring swatches, were sampled again from their own Gutenberg images.