M Graham Watercolor Cobalt Blue 15ml PreviousUltramarine Blue 15ml NextAnthraquinone Blue 15ml Cobalt Blue 15ml Cobalt Blue 15ml $24.87 Pigment Composition - Oxides of Cobalt and Aluminum (PB 28)Lightfast Rating - Excellent - LF IOpacity Rating - Semi TransparentStaining/Granulating - GranulatingSeries 5 Quantity: Add To Cart Facebook0 Twitter