It is a glow-in-the-dark night sky too, colored a mix of green, yellow, and red. Its colors result from scattered sunlight, oxygen, and sodium from shooting stars.

But you might be surprised to learn that for the 30 years prior, yellow stop signs were prevalent. Weird to think about in retrospect, right? But even more of an oddity is the elusive blue stop sign.

A telltale sign you’re getting sick is excess mucus, and if you’ve ever been desperate to stop coughing and sneezing, you’ve likely examined your mucus color, from yellow to green, for signs ...

A telltale sign you’re getting sick is excess mucus, and if you’ve ever been desperate to stop coughing and sneezing, you’ve likely examined your mucus color, from yellow to green, for signs ...

Perhaps you can recall the fictitious name "Roy G. Biv," where each letter represents a color in the spectral lineup: Red, Orange, Yellow, Green, Blue, Indigo and Violet. You may like ...

“Green” has been used in The Times to describe color, lack of experience and politics. By Sarah Diamond “Green” is “the color of growing grass,” according to Webster’s New World ...

The sky looks blue on a sunny day – but at night we can see the faint glow of its true colour. The sky isn’t just blue – airglow makes it green, yellow and red too Home ...