Inorganic – A variant of Ultramarine pigment. This colour is achieved by slightly altering the manufacture of the blue shade, Sodium Sulphosilicate, by heating it with Chlorine. The result is a weaker, more violet pigment that has a relatively low Tint Power and a degree of transparency that lends itself to being exploited in glazes or thin body colour. In hues, it becomes a high-keyed rather fluffy texture mauve which landscapists have found useful for the brighter tones of clear skies and for the modelling of sunlit clouds.
| Colour Index | PV15 |
| Drying | Average |
| Transparency | Transparent |
| Lightfastness | Excellent |
| Oil Content | Average |
| Tint Power | Average |
| Toxicity | Non-Toxic |
