A Verdaille is a painting executed entirely or primarily in shades of green. Such a painting is described as having been painted "en verdaille".
Verdaille has its roots in 12th century stained glass

Stained glass

The term stained glass can refer to coloured glass as a material or to works produced from it. Throughout its thousand-year history, the term has been applied almost exclusively to the windows of churches and other significant buildings...

 made for Cistercian monasteries which in 1134 prohibited the use of color in their art. Such paintings are less common than paintings executed in grey (grisaille

Grisaille

Grisaille is a term for painting executed entirely in monochrome or near-monochrome, usually in shades of grey. It is particularly used in large decorative schemes in imitation of sculpture. Many grisailles in fact include a slightly wider colour range, like the Andrea del Sarto fresco...

) or in brown (brunaille

Brunaille

A Brunaille is a painting executed entirely or primarily in shades of brown. Such a painting is described as having been painted "en brunaille"....

).