In this image, the strawberries decorated in the strawberry tart appear to be red.
When Akiyoshi Kitaoka from Ritsumeikan University in Japan shared this image in a tweet, it created confusion. While people said the strawberries appear red to them, Kitaoka revealed that the image does not have red pixels at all. To create the illusion the red pixels were switched with grey ones.
Despite the fact that the pixels were grey, people saw the strawberries red.