Nuff said right?

Trying to take any colour and change it too black lol, probably impossible.

This is what I do for the most part

Desaturate the horse layer

Make a clipped layer and add a Desaturated blue on top, use a soft airbrush to erase the colour from the eyex muzzle and legs

Make this layer a clipping mask

Duplicate layer or lower opacity where needed

Add highlights / shadows

I mostly desaturate the horse and then use curves to brings the color darker. I sometimes leave a little saturation for a more realistic look. Then add highlights and shadows and color match the horse to its background.