Colour index number: 74265

Pigment Classification: InorganicColor Index Name: PR101Color Index Number: 77491Chemical Description: Synthetic Iron OxideOpacity/Transparency: OpaqueLightfastness Rating: 1Permanency: ExcellentMunsell Notation Listing: Hue 0

49Tint Strength: 77

in this case

williamsburg oliemaling sf ultramarine blue french Olive Green Colour index number: 74265It is beautifully transparent, incredibly rich and deep, with a hint of red in the undertone (after the French style). Series: 2CI Number: NACI Name: PB29, PV15Pigment Name: Polysulfide of Sodium Alumino Silicate, Polysulfide of Sodium Alumino SilicateLightfastness: ASTM I ExcellentOpacity: TransparentGrind: Very Fine