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I understand how to do this with the pen tool, I guess I'm more looking for how to decrease the number of colors? I know there aren't very many shades in this photo, but for example, some images I want to do have about 5-7 different shades of blue in the character's shirt alone. Is there a way to basically take all those different shades and turn them into maybe 1-3 shades? So the 3 dark blue shades become 1 color and the 3 light blue shades become 1 color? Hope this makes sense.