Phosphorescent Wane Turquoise

Greek phōsphóros, light-bringer — adjectival suffix -escent. As a color modifier, phosphorescent implies a saturated-and-cool-glow-after-stimulation quality, the bright cool-green-blue color of Cu-doped-ZnS glow-in-the-dark photoluminescent surfaces. Sits at the bright-and-cool end of the grid, parallel to fluorescent and luminous in usage.

Old English wanian, to lessen. As a color modifier, wane implies a waning-moon-and-fading quality, the visual register of waning-moon-and-late-summer gradually-diminishing-and-receding waning-and-fading celestial-body-and-seasonal-light surfaces under waning-and-receding lunar-and-seasonal light. Sits at the modifier-and-time end of the grid, parallel to phase and eld in usage.

The hydrated copper-aluminum phosphate mined in Persia and the American Southwest for thousands of years — the firuze of Iran, the chalchihuitl of Mesoamerica, the heart of Pueblo and Navajo silverwork. The color refers to a fine Sleeping Beauty turquoise from Arizona: a saturated, slightly green-shifted blue with the slight matrix of host-rock veining. Brighter than persian, lighter than cerulean.