FastMatte colors give painters a palette of alkyd oil colors. Thin layers will be touch-dry and ready to be painted over in 24 hours. Ideal for underpainting for plein air and for any painter whose materials do not keep up with the pace of their painting. Colors dry to a matte surface with a beautiful tooth and a deep soft luster. FastMatte colors are compatible with other Gamblin painting mediums and traditional oil colors. 37ml. Cobalt blue.