Sorry, it was MY English that was the trouble! lol!
Does the colouring programs have a function that allows you to put on
a nearly transparent colour that would enhance the main color.
For instance Nicholas's red coat...could one place a slight dark brown on it first, that
would make the red shadows richer when that color went on ....that's how it done with paints.
The "undercoat " (in English we call a layer of paint ,"a coat" of paint ) can effect the look
of the "overcoat" ( the color on top, in this case : Red ) I wondered if computer coloring allows one to do the same?
Basically I'm saying that I would paint the shadows of Nicholas's tunic a brown...and so when I painted the red colour , the shadows of the garment would be richer, than if I just painted the red...and I wondered if one can do that in coloring photos?
I'm sorry, I didn't know how to answer You . I wrote already , that My English is not perfect . So I can answer Your question in such way : Photoshop allow
everything , any operation with color and shadows , if You know how to use Photoshop.
You only need the experience and ability to use Photoshop.