Michael Harding Ultramarine Blue - An obviously beautiful mid blue. The discovery in the 1820s of a Sodium Sulphosilicate compound, which had appeared as a mysterious blue deposit on soda-ash furnaces, was a liberating moment for financially challenged artists everywhere. Up to then the only available version of this compound was the often unobtainable Lapis Lazuli ore, mined in Afghanistan. Ultramarine has a high Tint Power. This shade produces strong green shade blue hues, and makes wonderful violets with Magenta and the red Lake colors. It is useful in greens and greys.