THIS mind-boggling illusion used to demonstrate what people with colourblindness can see has blown the minds of social media users. All you have to do is stare at the middle of the green, yellow, ...

Stare at the centre of an optical illusion with a black-and-white circular design. As you focus, you will notice a colour appearing at the centre. The colour you see—blue, red, green ...

The illusion is reminiscent of the viral debate over the black-and-blue or gold-and-white dress from nearly a decade ago, ...

Colour is an illusion, not part of the real world We think of colour as being a fundamental property of objects in life: green trees, blue sky, red apples. But that’s not how it works.

THIS mind-boggling illusion used ... contains three types of colour receptors known as cone cells which each have different absorption spectra - red, green, and blue. So, when looking at the ...