A closer look at “Why Some Rainbows Turn White”, exactly as the source publishes it. If you wander outside on a misty morning you may come across a white rainbow - called a fogbow! White rainbows need three things to form: mist, the sun, and you.
White rainbows are the same as regular rainbows, except they only form when the water drops in the air are super small. To find a white rainbow, go out when the Sun is low in the sky, like in This listing links straight to the original page, where the content is available in full.