A muted light indigo-blue with a slight green tint — a variation of the Edo-period favorite "納戸色" (nando-iro). "錆" (sabi, rust) describes the grayed version of the original color. Nando-iro is a shade of indigo dye, appearing as a dark blue-green. "納戸" (nando) refers to a storage room in traditional Japanese houses. The origin of the name is uncertain — theories include "the dark color of storage rooms" and "the color of storage room hanging curtains."