Orderly Day Lagoon

Latin ōrdō, order — adjectival suffix -ly. As a color modifier, orderly implies a clear-and-arranged-and-organized quality where the hue carries the visual register of carefully-ordered-and-classified placement. Sits at the crisp-and-orderly end of the grid, parallel to methodical and organized in usage.

Old English dæg, daylight period. As a color modifier, day implies a midday-and-broad-daylight quality, the visual register of Mediterranean-and-temperate mid-day full-sun atmospheric clarity-and-shadow open-sky working-and-walking surfaces under noon-day overhead light. Sits at the modifier-and-time end of the grid, parallel to noon and morn 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.