Why is the sky blue on Earth, yet space appears pitch black? This video uncovers the science behind one of nature’s most ...

I can't help but feel blue about the latest rumor that Apple's forthcoming iPhone 17 Air will take flight in a subtle, light-hued color called sky blue. Sky blue isn't a new color for Apple. It's ...

Called a cyanometer, it is a color wheel featuring 53 different colors for the observer to compare to the sky. A modern version of a cyanometer. (Image credit: Daniel Brown) Ozone blue at twilight ...

Each generation of iPhone brings with it a new color option that underlines the collection for that year. For Apple's inbound iPhone 17 models, that color could be a sky blue.

The skies of Italy and the Alps, on the other hand, frequently are clear blue. Of all the places which the writer has visited Greece has the purest and deepest blue sky.

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.

This mellow light blue may certainly seem familiar. Depending on where and at what time of the day you look at the sky, you might well expect to catch a glimpse of a similar colour.