B33 Indigo Extra Colour name: Indigo Extra Colour number: 33 Series: B Pigment classification: Phthalocyanine- Quinacridone-Carbon black Colour index: PB15:3-PV19-PBL7 Colour index number: 74160-73900-77266 Lightfastness: Lightfast pigment according to ASTM category 1 and 2 Opacity/transparency: Opaque