Rainbows are often seen as symbols of luck, and if you spot one, consider yourself lucky. That’s because a few things need to align, both in terms of weather and physics: a little rain, some sunshine, ...

But despite attempts from the best scientists and philosophers, what color truly is, if it’s even anything tangible, remains elusive. When it comes to the vexing problem of red or any other gradient, ...

Many of our viewers have captured pictures of rainbow clouds and this is actually called cloud iridescence. Meteorologist ...

ST. LOUIS – The sky is always changing colors—from a bright blue on a clear day, to red and orange sunrises or sunsets, or multiple colors of a rainbow—there’s a lot going on that we don ...

The eye can perceive millions of colors, but we struggle to name them. Colors that Westerners perceive as "primary" or pure are seen as mixed in other cultures—and vice-versa.