> APdraws oh, you can do it on any drawing app! first you put down some colors in the drawing app you're using, then you go to the settings of your device, and go to "accessibility". then it should have something about color filters, you click on that and tap "turn on color filter". it will make everything appear different shades of gray. make your drawing, and once you're done, go back to settings and turn off the filter. then boom you're done :D
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