This came up a couple of days ago: The effects of environmental colours on others in their vicinity. It seems a lot of people have trouble with the idea, so I put this one together.
Please note that I fully realise the workability of colour blobs for animation artists and cartoon painters, but those aren't who this tut is for. It's for all those who limit themselves by saying "But the tail of my fursona absolutely has to be #2E397D!"
Note also I'm a far cry from being a realistic painter, but I can as well share the little working knowledge that I have.
The tutorial was made in Photoshop; the image examples were done in watercolour. The whole thing is usable for digital as well as traditional art.
Download for full view! Hope it helps!
Images used above: