It's funny because if you scroll through Google images fast enough, you will catch glimpse of monochromatic placeholder images for images that haven't loaded ye

It's funny because if you scroll through Google images fast enough, you will catch glimpse of monochromatic placeholder images for images that haven't loaded yet. The placeholder image seems to be the average color (maybe with some object boxing to reduce contributions from backgrounds and such) inside the image. This website is kind of the opposite in that it presents the placeholder color as if it were the content itself.