At first Gris painted in the analytic style of Cubism, but after 1913 he began his conversion to synthetic Cubism, of which he became a steadfast interpreter, with extensive use of papier collé. Unlike Picasso and Braque, whose Cubist works were monochromatic, Gris painted with bright harmonious colors in daring, novel combinations in the manner of his friend Matisse.
In 1924, he first designed ballet sets and costumes for Sergei Diaghilev and the famous Ballets Russes.
Gris articulated most of his aesthetic theories during 1924 and 1925. He delivered his definitive lecture, Des possibilités de la peinture, at the Sorbonne in 1924. Major Gris exhibitions took place at the Galerie Simon in Paris and the Galerie Flechtheim in Berlin in 1923, and at the Galerie Flechtheim in Düsseldorf in 1925.
He died in Boulogne-sur-Seine (Paris) in the spring of 1927 at the age of forty, leaving a wife, Josette, and a son, Georges.
His top auction price is $20.8 million which was set by his 1915 still life titled, Livre, pipe et verres.
The Sunblind (1914, see at Tate Gallery)
The Painter's Window (1925)
Harlequin with Guitar (1919)