[↑] Johann Wolfgang von Goethe – de Farbenlehre (1810); [↖, ^, ↗, +] Abraham Gottlob Werner – Selections from Werner’s Nomenclature of Colours (1814); [↙] Johannes Itten – Color Sphere in 7 Light Values and 12 Tones (1921); [↘] Yves Klein – Blue Circle (1957); [v] Cy Twombly – Untitled (1970); [↓] x-rite – Color Checker (201X)
An Illustrated Chronology of Color Taxonomies: 1810 to Present (Incomplete)
Acetylene Eyes 