Viridian is a transparent emerald green colour. Named after the Latin for green 'viridis', it was first made in Paris by colourist Binet in 1838 as a replacement for the deadly Emerald Green.
Potter's Pink is a soft rose colour. It is a semi-opaque colour with excellent lightfast qualities. It is commonly used in ceramics and frescos, giving its name Potter's Pink.
French Ultramarine is a rich transparent blue. It was created by French chemist Guimet in 1828 as a synthetic but chemically identical alternative to the expensive pigment derived from Lapis Lazuli.