Untroubled Sagittarius Lagoon

Latin turbāre, to disturb — negative-prefix un- plus past-participle of trouble. As a color modifier, untroubled implies a clear-and-calm-and-undisturbed quality where the hue carries no visual agitation. Sits at the crisp-and-calm end of the grid, parallel to serene and placid in usage.

Latin sagittarius, archer-of-the-zodiac. As a color modifier, sagittarius implies a centaur-archer-and-fire-sign-and-Jupiter-ruled-mutable-fire quality, the visual register of Hellenic-Sagittarius-and-Chiron-centaur-archer hand-centaur-archer-and-fire-sign-and-Jupiter-ruled-mutable-fire Hellenic-Sagittarius-and-Chiron-centaur-archer-and-galactic-center sagittarius-and-centaur-archer-and-fire-sign surfaces under Hellenic-Sagittarius-and-Chiron-centaur-archer-and-galactic-center late-autumn-and-November-and-December mutable-fire-sign-light. Sits at the modifier-and-zodiac end of the grid, parallel to scorpio and capricorn 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.