A personal favourite, I love how this interacts with orange in landscape painting, it makes some of the most delightful greyish, oranges imaginable!
Also it is a secondary colour that is very hard to mix cleanly from primary colours, so very useful in that respect too.
First made from the rare ore of Cobalt Phosphate in the mid-19th century, this is now a synthetic inorganic pigment, of which the lighter shade is closer to the original, natural version.
Cobalt Violet Light has a very delicate shade of violet which appears quite opaque in mass-tone which quickly becomes transparent when applied thinly, and when glazed over a white ground, creating a very interesting range of bluish pinks. The hues are equally restrained.
Pigment - PV14
Drying Time - Fast
Vehicle - Linseed Oil
Opacity - Slightly Opaque