Indigo – NB1
Indigo is a dye that is extracted from more than 30 different species of the plant Indigofera, which is widely present in large parts of the world. It is from the green leaves that…
Category: Blue colors
Mayan blue
People have long wondered how the Mayan people, thousands of years ago, could produce a blue color so resistant to light, moisture and other degrading factors that after a thousand years, or more, the…
Is blue the most important color?
When I teach about colors for the first time with my students, I usually say that the color blue is important, perhaps the most important of all. On the other hand, I have met…
Cobalt Blue Deep (PB72 PB73 PB74)
In 1802, the French chemist Louis Jacques Thénard discovered the pigment we today call cobalt blue deep in an attempt to find a blue color that could replace the very expensive lapis lazuli. There…
Cerulean Blue (PB35, PB36)
If you search for “Cölinblå” on Google, which is the traditional Swedish name for the color, you only get a few results, most from Riksantikvarieämbetet (The Swedish National Heritage Board), but if you change…
Phthalo blue green shade (PB15:3)
Phthalo blue is available in several variants. The most common are PB15:1 and PB15:3, PB15:1 is warmer than PB15:3 and is often called red shade while PB15:3 which is greenish is often called green…
Indanthrone (indanthrene) PB60
The dye PB60 was developed by the German chemical company BASF, and came onto the market in 1901, but it was not until the 1950s that it was used as a pigment in artists’…
Cobalt Blue (PB28)
Long before cobalt blue there was a pigment called smalt, cobalt glass ground to a fine powder. Smalt dates back to 2000 BC. It was used mainly for ceramics in ancient Egypt and in…
Prussian blue (Iron blue)
Iron blue or Prussian blue is a very old synthetic pigment, it was invented in 1704, by chance, by Heinrich Diesbach who was active in Berlin which was in then Prussia, therefore the color…
French Ultramarine
French ultramarine is a synthetic pigment, original ultramarine is extracted from semi-precious stone lazurite. Lapis lazuli is another name for the color. Good quality of Lapis lazuli could once be more expensive than gold…
