The deep blue sea may ... and may "favor purple sulphur bacteria living in deep waters without oxygen." In different circumstances, the ocean could even turn red, brown or green again.

Scientists have resurrected a purple-blue hue whose botanical origin had ... But it fell out of use, and the watercolor’s identity has eluded scientists for decades. Now, after tracking down ...

which is predominantly green and blue,” Baseman said in a conversation for Variety Artisans presented by HBO. “And then there’s one room that’s purple, you see a little bit of it.