Blue skies were smiling and bluebirds were singing for Irving Berlin, but blue is actually nature's rarest color. Blue flowers are less than 10% of the world's 300,000 flowering plant species.

Synthetic ultramarine and a new “Monastral Blue,” another deep shade, began to be industrially produced. Blue of all kinds was no longer only for kings and Christ. Blue can be found from Monet’s plein ...

Ultramarine blue reduced gray cast, while zinc oxide reduced white cast and created warmer, redder hues in an ultramarine blue base. Next, Karissa Richards, ...

After learning about a blue pigment called ultramarine blue from a podcast, another student in Baki’s lab approached her about studying the pigment. “If you think about traditional color theory ...

Klein developed the formula for his signature blue in the 1950s, combining ultramarine with a matte synthetic resin binder to create what he called "the most perfect expression of blue" and used ...