Symmetrical Noon Lagoon

Greek symmetría, due-proportion — adjectival suffix -al, derived from sym-metron (with-measure). As a color modifier, symmetrical implies a clear-and-balanced-and-mirrored quality where the hue carries the visual register of bilateral-or-radial proportional symmetry. Sits at the crisp-and-balanced end of the grid, parallel to balanced and aligned in usage.

Latin nona-hora, ninth-hour. As a color modifier, noon implies a midday-and-overhead-sun quality, the visual register of Mediterranean-and-Provençal high-noon vertical-shadow-and-strong-light bleached-and-clear-cast surfaces under high-noon overhead light. Sits at the modifier-and-time end of the grid, parallel to day 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.