i saw this pic earlier, and you have to see it too. There is no yellow in this image. Our brains are just making it up. the pic only has blue stripes, black stripes, purple, gray, light blue and white. and the part that looks yellow is actually just white
One of the most fascinating things about neuroscience is that your brain doesn't really see the world, it interprets it. in this case, our visual system uses the surrounding colors and patterns to create the perception of yellow, even tho there's actually no yellow in the image. this phenomenon is called "neon color spreading"
I love illusions like these..even after colorpicking and seeing there's no yellow for myself, I still have a hard time believing it lol