Blue dress and black or white and gold?

Sunday afternoon I got a notification via WhatsApp: "hugo, my friends are driving me crazy; see you like this dress, blue and black or white and gold?

I looked at the photo and I was a little perplexed thinking "because I see clear: blue and black." How can it be that someone sees white and gold? Everything points to an optical illusion of intergalactic proportions ... The next day I see articles appearing citing the phenomenon Quesabesde XatakaFoto and ... the Internet phenomenon spreads like wildfire. And I begin to write some friends: "Hugo, you've mastered the color, we can you clarify something?" Overall, they have to write something about it ... Well, apparently the dress in question is of the firm Roman and there in different colors. For the official photo's on their online store it is clear that is black and blue.

But a user platform Tumblr, swiked, seeking help for their favorite model posted a picture on your profile looking for the opinions of their friends and followers. That's when it started to become involved, because some of them said that they saw white dress and gold. At first it felt that they were just joking, but quickly dispelled this doubt is to see close friends received comments saying something similar.

Once I took the lab a can of Coke, which as you know is a deep red color. Inside the lab a red safelight, which is very weak and deep red is used. When I pulled out of the backpack, and in the laboratory, and placed on the table I was stunned to see that all entries had disappeared and the can looked like it had not been printed. Come on, smooth and clean aluminum. He stood me literally face checkered. I knew I had to buy that soda a few minutes ago and it was completely red, so I could not believe what was happening. I grabbed the can, I went outside and looked at daylight. To my amazement, they returned to "appear" all of silkscreen prints. The can was back to what I expected, well ... So, why do under a red light disappears every appearance ... red? Because under a light of intense color, all objects of that color are perceived targets. In the same way that looking through a deep red filter.