When you're sick you'll often produce more phlegm, and might notice it's thicker or a different color: white, green, yellow ...

Depending on the length of fermentation, tea is sorted into six categories: green, yellow, white, oolong, black and dark teas (aka Puer tea).

Today, the most efficient white LEDs use blue light emitting diodes with a rare-earth phosphor coating that converts the blue light into yellow, green and/or red which enables white lighting.

Polka dot – King of the Mountains Perhaps almost as famous as the yellow jersey itself, the red polka dots on a white base are awarded to the rider who earns the most King of the Mountains ...

The sun is white—kind of. It depends on your interpretation of color, the way colors work, the way our eyes see and, just as importantly, the air we see through. Back in the 1850s the new study ...

Riders compete for the yellow, polka dot, green and white jerseys at the Tour de France 2023. Here's a guide to how each is won, and what they mean.

Chris Froome won both the polka dot jersey and the yellow jersey in 2015, the first to do so since the great Eddy Merckx in 1970. In 2018 it was won by home favourite Julian Alaphilippe in some style.