M. Graham Complete - Set of All 35 Gouache Colors in 15ml Tubes - Here is a complete set of all 35 M. Graham professional gouache colors in 15ml tubes at a great price! M. Graham Gouache is an extremely high quality paint. All of the M. Graham paints feature high pigment load with no excess fillers to weaken or distill the color intensity. The gouache has an excellent flow and all colors dry to a beautiful matte texture. The colors can be mixed with water to produce watercolor effects, or use them directly out of the tube for solid, opaque effects.