..the flag is green with a red spot in the center; above, the blue of the sky, the orange-tinted white of the walls, and the orange-grey of the clouds.
Source, in full
short notation, 1881: from 'Notes inedites de Seurat sur Delacroix', in 'Bulletin de la Vie Artistique', April 1922; as quoted by John Rewald, in Georges Seurat', a monograph; Wittenborn and Compagny, New York, 1943. p. 6 - note 9
Notes from Wikiquote
Seurat studied carefully the paintings of Eugene Delacroix, and wrote in 1881 about Delacroix's painting 'The Fanatics of Tangier' this notation