Spanish green has long recurred in literature as a vivid descriptor, emblematic of both hue and material. Early texts delineate it as equivalent to verdigris—a term firmly linked with richly pigmented substances in artistic recipes, as seen when it is tempered with pure wine to create shadows [1] or set in contrast with other pigments like red lead and white lead [2]. Its identity is firmly established in color lexicons, being interchangeably called Spanish green or verdigris [3], [4], and even noted by figures such as Cotgrave [5] and in variant form as “spanish greene” [6]. Beyond the realm of artistic pigment, the color’s character extends to the natural world in the naming of living creatures—illustrated by the “Spanish green-finch” [7]—and to the physical description of objects, as with axes fashioned from Spanish green-stone [8].