Placid Glide Lagoon

Latin placidus, gentle / quiet — derived from placēre (to please). As a color modifier, placid implies a clear-and-unruffled quality where the hue carries the visual register of mirror-smooth lake-surface in windless mid-morning. Sits at the crisp-and-calm end of the grid, parallel to serene and peaceful in usage.

Old English glīdan, to-move-smoothly. As a color modifier, glide implies a smooth-and-silent-and-frictionless quality, the visual register of swan-and-skater-glide hand-smooth-and-silent-and-frictionless swan-and-skater-and-soaring-albatross glided-and-smooth-and-silent-and-frictionless surfaces under swan-and-skater-and-soaring-albatross frozen-pond-and-Hyde-Park-Serpentine-and-open-ocean smooth-flight-light. Sits at the modifier-and-mood end of the grid, parallel to float and hover 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.