Yes, you’ve read the title correctly — this photo is not colored. It’s in black and white.
This optical illusion is made by digital media artist and software developer Øyvind Kolås as a visual experiment. Kolås calls the technique the “color assimilation grid illusion”.
...the technique… achieves its effect by simply laying a grid of selectively coloured lines over an original black-and-white image.
"An over-saturated coloured grid overlaid on a grayscale image causes the grayscale cells to be perceived as having colour," Kolås explains on his Patreon page.
So what’s happening here that makes our brains see this as a full-color image? Find out on Science Alert.
(Image Credit: Øyvind Kolås)