Antiseptic Hill Lagoon

Greek anti- (against) plus sēptikós (putrefying) — adjectival suffix -ic. As a color modifier, antiseptic implies a clear-and-disinfected-and-clinical quality, the crisp color of medical-laboratory and operating-theater hand-scrub-and-sanitizer surfaces. Sits at the crisp-and-clean end of the grid, parallel to sterile and sanitary in usage.

Old English hyll, natural elevation. As a color modifier, hill implies a rolling-rise-and-pasture quality, the visual register of South-Downs-and-Cotswolds rolling chalk-and-limestone hill-pasture-and-sheep-grazed open surfaces under broad rolling-hill English-pastoral sky. Sits at the modifier-and-place end of the grid, parallel to dale and bluff 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.