Phthalo Blue Green Shade Series 2 Pigment Color Index name PB15:4All Phthalo pigments have and extremely high tinting strength. In mass tone they are extremely dark in value often overlooked on the shelf since they appear black. They are also transparent in nature. Therefore they are an excellent choice for extending with wax medium for glazing. When used for mixing other colors only a small amount is needed. Phthalo Blue Green Shade makes a stunning turquoise blue when mixed with either Zinc White or Titanium White. Phthalo Blue Green Shade is in our Enkaustikos Hot Cakes Extended Academy Set.