Brunswick Blue.
—This is bought ready made, and can be imitated by adding white lead to Prussian blue in sufficient quantity to obtain the desired tint.
Coeruleum.
—This is an artist’s colour of a light and somewhat greenish blue tone. An imitation may be made from ultramarine and white, with a little yellow, although the colour is a difficult one to imitate successfully.
Celestial Blue.
—About equal parts of Prussian blue, chrome green and white lead will give this colour, but there should be most white, and the tint should be more blue than green.
Chinese Blue.
—Another name for [Prussian blue], which see.
Cobalt.
—This colour is one of the best artists’ colours, and cannot be successfully imitated. It is a beautiful and most useful colour, but unfortunately it is expensive, and it is, therefore, only used in the finest work.