M. Graham Oil Color - Cobalt Blue 37 ml M. Graham & Co. from $19.41 $32.35 Qty. Add to Cart SKU: GRM-11-090 This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Pigment Composition: Oxides of Cobalt and Aluminum (PB 28), Lightfast Rating: Excellent - LF I, Opacity Rating: Semi Transparent, Drying Time: Fast Tweet