It's something that most of us learn as toddlers. But a new test will have you questioning everything you thought you knew about colours. The 'Hue Shift' test shows you two colours and asks you to ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Illustration: Guardian Design It started with an argument over a blanket. "I'm a visual neuroscientist, and my wife, Dr Marissé ...

Are you confident that the sky is blue and grass is green? What about everything in between? A viral test asking people to pin down the line where blue ends and green begins is showing that we could ...

One of the reasons why it's so important to calibrate monitors carefully is that we all see different colors, as this simple online test proves. Is it blue, or is it green? It's a question that should ...

This story is part of a series on the current progression in Regenerative Medicine. This piece is part of a series dedicated to the eye and improvements in restoring vision. In 1999, I defined ...

Research on the perception of color differences is helping resolve a century-old understanding of color developed by Erwin Schrödinger. Los Alamos scientist Roxana Bujack led a team that used geometry ...