Azurite was the only natural blue pigment used in early China.

These representations are depicted in natural pigment white, blue, green, and red.

Today most blue pigments and dyes are made by a chemical process.

I wonder if you could spare some of that blue pigment?

Green has also often been made by mixing blue and yellow pigments.

The blue pigment used by the artist has faded badly since the picture was painted.

Ultramarine is a blue pigment in use since medieval times.

The sulfur burns, and a fine blue pigment is obtained.

It has a vivid blue pigment, and is the better known of the two extant species.

Production technologies and applications of two historically important blue pigments.