Add this rare flower color to your garden with expert-recommended plants that bloom in various shades of blue. Jackie Parker Photography Blooms come in a variety of hues, but in the flower world, blue ...

The animal kingdom gives us rainbows of color with butterflies and chameleons, and clownfish, but birds give us just as much of a show. Among the peacock, the toucan, and the macaw, there’s a ...

What color is a tree, or the sky, or a sunset? At first glance, the answers seem obvious. But it turns out there is plenty of variation in how people see the world—both between individuals and between ...