Since a 19th century theory put forward by German physiologist Ewald Hering, color scientists have considered the hues red, ...

First there was "the dress," then there was the sneakers, now there's a debate over the color blue. If you've ever argued with a friend over whether something is blue or green, you're not alone. A new ...

There are three main types of color vision deficiency: red-green, blue-yellow, and complete. Color blindness, or color vision deficiency, affects the way you perceive color and can make it hard to ...