white gold or blue black dress Color scientists explain the that went viral In 2015, a photograph of

Boffins say the picture is the most dramatic example of differences in colour perception ever documented

In the image as presented on, say, BuzzFeed, Photoshop tells us that the places some people see as blue do indeed track as blue

"One framework for understanding why you get these variations is to consider how light is contaminated by outside illumination, such as a blue sky or incandescent light

For instance, if the sensory information is more uncertain, observers will estimate object speeds to be slower than they actually are, presumably because slow objects are much more common in the environment than fast ones

That simple question has divided people into two irrationally passionate camps: white and gold and blue and black

But that probably has more to do with the background than the actual color