Buttoned Roman Lagoon

Old French bouton, button — past-participle of button. As a color modifier, buttoned implies a clear-and-fastened-and-formal quality, the crisp color of Edwardian-period formal-attire fully-fastened-and-formally-dressed gentleman's-attire. Sits at the crisp-and-finished end of the grid, parallel to trim and pressed in usage.

Latin Romanus, of-Rome. As a color modifier, roman implies an empire-built-and-classical quality, the visual register of Roman-Imperial hand-laid pavement-and-fresco-and-bronze-and-marble Republican-Imperial classical surfaces under Mediterranean-Roman-Imperial classical-architecture afternoon light. Sits at the modifier-and-cultural end of the grid, parallel to etruscan and hellenic in usage.

A shallow body of saltwater partially or fully enclosed by a barrier — coral atoll lagoons in the Pacific, Venice's Laguna Veneta, the Florida Keys' backcountry. The color refers to the average reflectance of a calm tropical lagoon at midday: a saturated, slightly muted blue-green with the optical clarity of shallow water over white sand. Brighter than reef, cooler than aquamarine, with the postcard weight of a Pacific atoll seen from above.