Sterile Ray Turquoise

Latin sterilis, barren / not-fertile — sharing root with Greek steiros (barren). As a color modifier, sterile implies a clear-and-medical-clean-and-stripped quality, the crisp color of operating-theater surgical-environment white-and-stainless-steel surfaces. Sits at the crisp-and-clean end of the grid, parallel to sanitary and hygienic in usage.

Latin radius, spoke-or-beam. As a color modifier, ray implies a radiant-and-spoke-of-light quality, the visual register of Bernini-Gloria-and-Baroque-altarpiece-ray hand-radiant-and-spoke-of-light Bernini-Gloria-and-Baroque-altarpiece-and-Counter-Reformation rayed-and-radiant-and-spoke-of-light surfaces under Bernini-Gloria-and-Baroque-altarpiece-and-Counter-Reformation gilded-spoke-and-altar-and-cathedral-dome heavenly-light. Sits at the modifier-and-mood end of the grid, parallel to beam and gleam 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.