(One of those very vague descriptions that lends itself to a great deal of creativity in the drapery and trimming of the dress.)
Dress of dull grey, muslin or gauze, over satin; silver ornaments and smoked pearls; a bat on shoulders.
(See also: In The Gloaming)
Source: Holt, Ardern. Fancy Dresses Described, 5th Edition. London: Debenham & Freebody, 1887.