The blue of 2020 is not Cerulean (the company’s first pick, back in 2000), Aqua Sky (2003), Blue Turquoise (2005), Blue Iris (2008) nor Serenity (which shared the 2016 title with Rose Quartz).

The stuff occurs on Egyptian artifacts dating to around 2500 B.C. and was still in use when Mount Vesuvius buried Pompeii in A.D. 79. In the Middle Ages color became central to the alchemists ...

In plain water, these pigment molecules give the water a blue color. But when acid in the lemon juice gets in the water a reaction makes the indicator molecule change so the color looks pink. When the ...