cyan

The term 'cyan' has a direct lineage from the Ancient Greek 'kyanos', which referred specifically to a deep blue substance, often associated with lapis lazuli. In the 19th century, it was adopted into scientific Latin and subsequently into English to name a specific hue in the context of color theory, light spectra, and later, printing processes. The modern abstract meaning shifted from denoting a specific dark blue mineral pigment to a precise, technical term for the greenish-blue color complementary to red in the subtractive (CMYK) and additive (RGB) color models. This evolution illustrates how a classical term for a material was repurposed to serve a precise function in modern scientific and industrial taxonomy.

The word 'cyan' is a simplex loanword. It originates from the Greek word 'kyanos', meaning "dark blue, dark blue enamel, lapis lazuli". It entered English via scientific Latin in the 19th century.