Placid Swoop 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 swāpan, to-sweep-down. As a color modifier, swoop implies a fast-descending-and-arcing-down quality, the visual register of peregrine-falcon-and-stooping-hawk-swoop hand-fast-descending-and-arcing-down peregrine-falcon-and-stooping-hawk-and-eagle swooped-and-fast-descending-and-arcing-down surfaces under peregrine-falcon-and-stooping-hawk-and-eagle cliff-face-and-moorland-and-open-sky raptor-stoop-light. Sits at the modifier-and-mood end of the grid, parallel to flit and glide 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.