Symmetrical Easter 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.

Old English Ēastre, Easter. As a color modifier, easter implies a Paschal-and-spring-feast quality, the visual register of Roman-Catholic-and-Anglican Easter-feast spring-resurrection white-and-gold-and-cream paschal liturgical surfaces under Paschal-feast spring-resurrection candlelight. Sits at the modifier-and-time end of the grid, parallel to advent and yule 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.