Cobalt blue
Cobalt blue in impure forms had long been used in Chinese porcelain, but it was independently discovered as a pure alumina-based pigment by Louis Jacques Thénard in 1802. Commercial production began in France in 1807. The first recorded use of "cobalt blue" as a color name in English was in 1777. The leading world manufacturer of cobalt blue in the 19th century was Benjamin Wegner's Norwegian company Blaafarveværket ("blue colour works" in Dano-Norwegian). Germany was also famous for production, especially the blue colour works ("Blaufarbenwerke") in the Ore Mountains of Saxony.
Cobalt Blue (novel)
Cobalt Blue is a 2013 fictional drama novel by Indian film director, screenwriter and playwriter Sachin Kundalkar. It was the debut novel of Kundalkar and first published in 2006 in Marathi language, it was re-released in English in 2013 with translation by Jerry Pinto. The story follows two siblings, Tanay and Anuja who fall in love with the same young man who comes to stay at their house in Pune as a paying guest. The novel deals with the theme of sexuality, family and society.