AllRGB is an old-fashioned image gallery on the web. The draw? Each image on it must include, without repetition, one pixel for every RGB value.
The objective of allRGB is simple: To create images with one pixel for every RGB color (16,777,216); not one color missing, and not one color twice.
It's possible to create such an image with filters (some of them very impressive). There's a lot of slop, but many of the images are beautiful, strange, geometric, arty and intriguing. And some come with the code to render them.
Most of the images are very large. Here's the smallest possible.
See also Davie Aerne's Color distribution of Color-Names in various color models. If you would like to help, you can name every 24 bit RGB color at the Color Names website. I did my part.