grisaille

[ gri-zahy, -zeyl; French gree-zah-yuh ]

/ grɪˈzaɪ, -ˈzeɪl; French griˈzɑ yə /

monochromatic painting in shades of gray.

a work of art, as a painting or stained-glass window, executed in grisaille.

Origin of grisaille

1840–50; < French: painted in gray monotone, equivalent to gris gray + -aille noun suffix

Here the contrast of rich tones and grisaille is not so disagreeable as in the clerestory.

Stained Glass Tours in France |Charles Hitchcock Sherrill
At the church of S. Alpin at Chlons is a series of picture windows in grisaille, not often met with, and very well worth seeing.

Windows, A Book About Stained & Painted Glass |Lewis F. Day
In England there is from the first usually a certain amount of coloured glass in grisaille windows (pages 141, 332).

Windows, A Book About Stained & Painted Glass |Lewis F. Day
Owing to the lights being narrower in the fifth the border is omitted, and in the sixth the grisaille work is also omitted.

Bell's Cathedrals: The Abbey Church of Tewkesbury |H. J. L. J. Mass

Little Bible subjects were also painted, mainly in grisaille.

Windows, A Book About Stained & Painted Glass |Lewis F. Day

grisaille

/ (ɡrɪˈzeɪl, French ɡrizɑj) /

a technique of monochrome painting in shades of grey, as in an oil painting or a wall decoration, imitating the effect of relief

a painting, stained glass window, etc, in this manner

C19: from French, from gris grey