Dusty, cool grey, like the underside of a clamshell or a monk's worn cloak.
Mantle is a cool grey, close to green.
It can be described as cool, muted, greyish and dusty.
Set in black, because black reads best on it.
A mantle is a type of loose garment usually worn over indoor clothing to serve the same purpose as an overcoat. Technically, the term describes a long, loose cape-like cloak worn from the 12th to the 16th century by both sexes, although by the 19th century, it was used to describe any loose-fitting, shaped outer garment similar to a cape. For example, the dolman, a 19th-century cape-like woman's garment with partial sleeves is often described as a mantle.
Read on WikipediaA mantle is an ecclesiastical garment in the form of a very full cape that extends to the floor, joined at the neck, that is worn over the outer garments. Especially in the case of Elijah, it was likely a tallit, a Hebrew garment that housed the fringes still seen today which are also translated at "the hem of His garment" in the New Testament. It is also likely that further ecclesiastical garments were based originally on this one.
Read on WikipediaThe mantle is a significant part of the anatomy of molluscs: it is the dorsal body wall which covers the visceral mass and usually protrudes in the form of flaps well beyond the visceral mass itself.
Read on WikipediaA mantle is a layer inside a planetary body bounded below by a core and above by a crust. Mantles are made of rock or ices, and are generally the largest and most massive layer of the planetary body. Mantles are characteristic of planetary bodies that have undergone differentiation by density. All terrestrial planets, half of the giant planets, specifically ice giants, a number of asteroids, and some planetary moons have mantles.
Read on WikipediaProper noun