I have a client who runs a tattoo shop and he'd like to be able to show customers the same tattoo in different colour/shades of colour. Is there a way maybe using channels or layers that he will be able to seperate each colour (including it's gradients) and alter it's colour? Or is there another way to change just one colour (and it's gradients once again) with out doing the same to the others? I'm thinking the best way is to just create the images with each colour separated into it's own layer and just altering that layer but it's kinda fiddly because each layer would most likely need it's own layers of R G and B to be able to efect it accurately. Suggestions?