See inside for instructions how to use. - Why this scanner is faster than most (maybe even all?) scanners currently on Scratch: The scanner stores the colors it has already scanned in a list. The last scanned color will automatically go to the top, so it sorts itself. Before the scanner tries to scan an unknown color, it goes through the list of colors that already were scanned and sorted, so it only has to scan a new color once, instead of brute forcing it with scanning every pixel.
Example project using this scanner: https://scratch.mit.edu/projects/377826777/ - Resizable images