To be honest, This doesn't make you colorblind for 5 seconds, it actually is a black-and-white color illusion. But a lot of people still call this being colorblind. Note: I keep adding and removing this one sooo sorry if that's an inconvenience to you. *****(Not my best project )******
****Remember this will only work if you STARE at the dot in the middle of the pictures until it switches to the black and white picture (if you did it right then you should be able to see color)*** This illusion normally will only last for about 2-5 seconds
