Racmanaz Loc: Sunny Tucson!

Interesting article.

https://www.livescience.com/why-blue-rare-in-nature.html

rmorrison1116 Loc: Near Valley Forge, Pennsylvania

Is it? What are two of the biggest things in nature on earth? The sky and the oceans!
What I think is really cool is BlueJay's have absolutely no blue pigment at all and under the right light, aren't actually blue.

JD750 Loc: SoCal

And let's not forget blue berries! Morning Glories and other blue flowers.

rmorrison1116 Loc: Near Valley Forge, Pennsylvania

I love the smell of Morning Glories and Blue Berries are one of my favorite berries, yummy.
Blue berry muffins, mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm.

Racmanaz Loc: Sunny Tucson!

Blueberry pie my oh my.

Canisdirus

Heh...finding exceptions does not mean blue isn't rare folks...it is...statistically.

sodapop Loc: Bel Air, MD

Well, the ocean and the sky are pretty big exceptions I would say

Canisdirus

Okay...two examples from trillions.

Heck, let's just say there are 10,000 examples...still rare.

StanMac Loc: Tennessee

The ocean reflects the sky color. Look at it on a gray overcast day - no blue.

Stan

sodapop Loc: Bel Air, MD

And all colors look black and white in the dark

DirtFarmer Loc: Escaped from the NYC area, back to MA

My pool looks blue but the sides are painted white.

The sky is actually pretty clear. It's dust and small particles suspended in the air that make it look blue. Rayleigh scattering (light scattered by particles smaller than the wavelength being scattered) makes it look blue because the shorter wavelengths in sunlight (blue) are scattered. If this did not happen the sky would look black and you would be able to see stars. When the particles are larger than the wavelengths being scattered, you get Mie scattering. That's why you get red sunsets when there's a lot of smoke in the atmosphere.

It's also why the sky light is polarized perpendicular to the sun.

Liquid oxygen is blue. Liquid nitrogen is clear. Liquid hydrogen is clear. (I have only observed small quantities of these liquids and not large tanks).

At school we had a stairwell without windows that was lit by low pressure sodium lamps (primarily the yellow sodium doublet at 577 nm). Stepping into that stairwell gave you a monochrome view of the world, black and yellow. If you stayed in there long enough it became black and white as your brain compensated. It took a couple minutes.

TheShoe Loc: Lacey, WA

Same it true for Indigo Buntings. Their perceived color shifts from gray in bright sunlight to vivid blue in heavy shade where there in a lot of UV light.