We are so used to the oceans being blue we use it as a signifier everyone recognizes on maps. However, the color is not ...

Is your green my green? Probably not. What appears as pure green to me will likely look a bit yellowish or blueish to you.

For ages, Earth has been known as a blue planet, a vision largely shaped by the vast oceans that cover three-quarters of its ...

An object's color appears differently under different lighting and against different backgrounds — for different viewers. But ...