@Grouchy111 "if you do [set [color] effect to (1/0)] it makes it black and white, on mobile it makes it red" You can test it :) On my phone it makes it b&w. On an other PC it is red. https://en.scratch-wiki.info/wiki/Graphic_Effect#Infinite_Color_Effect The documentation writes grayscale, not red. Thanks to @papipupepappa for the remix and helping me understand how it works I think in this case (set color effect to infinity) Scratch sets all color components to the value of the smallest color component. For example. the cat's face is #00FFFF, then the 3 color components are 0, 255 and 255, the smallest is 0, so it will be 0 0 0, black. The cat's color is #FF9533, so the smallest is 0x33 (51), and the result will be #333333 (dark gray).