Just released, an interesting new “tint transfer” engine for Photoshop called MagicTints 1.0. I especially like the apparently semi-generative ability to…
“iterate through moods, matte color spaces and ideas”
It needs a later CC 2014+ versions of Photoshop and it works as a Panel. There’s a 15-day demo.
I’d just suggest that someone wanting to save $39 could probably wait six months on this. To find that something very similar has been added to G’MIC, and thus to Krita, for free. G’MIC already has 2D style-transfer, auto-colour of line-art, and automatic greyscale-to-colour (see below)… and thus instant-and-acceptable tint-transfer between 2D pictures can’t be far behind.