M. Graham [Cobalt Blue] 15ml - Brand: M. Graham & Co. - Color: cobalt blue - Capacity: 15 ml - Series 5 - PB28 - Lightfastness: Ⅰ Cobalt Blue 090 is a bright and clear primary blue. Thank you for viewing. I purchased this as part of a set and am selling the colors I already have. If you purchase multiple M. Graham paints together, we will discount 200 yen from the second item onwards to cover shipping costs. Instant purchase is OK.