I’m using Clip Studio Paint, but you can use Photoshop or any other program with a Hue function

This is a really useful trick if you want to either test the colours you’ve chosen for a complex art piece or change the colour system for a client without going through each individual layer and changing them.

I use it all of the time to tip my graphics toward warm or cool colours and to test whether another colour ratio might be a better choice. Its a good way of making sure that a run of related artwork – like magazine illustrations, postcards etc. – has a good-looking colour system that applies to each piece.

Its simple to do. Just add a Hue adjustment on a layer that affects *every channel* and then gently sweep through the spectrum. Each and every colour will be changed to a different shade by the same amount, thus preserving your ratios.

If you want to keep a layer out of the sweep, then place it above the adjustment layer.