“Olivaceous” describes a shade of green deeper and duskier than grass green; as the name implies, it’s more akin to the color of olives or olive oil. The word is borrowed from the Latin “olīvāceus,” a combination of the words “olīv(a)” (“olive”) and “-aceous” (“the nature of”). Olive trees were originally native to Asia Minor, but they’ve since spread throughout the Middle East and the Mediterranean. This evergreen species is the world’s oldest known cultivated tree, grown by farmers even before the onset of written language.