Ultramarine is a rich deep transparent blue.

Ultramarine is a rich deep 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.

群青(Ultramarine)是一種濃郁的深透明藍色。 它由法國化學家 Guimet 於 1828 年創造，作為一種合成但化學性質相同的替代品，可替代從青金石中(Lapis Lazuli)提取的昂貴顏料。