Like everybody else in this site I've been new to blender for quite some time...
The idea is to have a drop of colored paint displace the surface, so that the colors don't really mix but create variable abstract fluid and organic shapes.
As an example please take 30 seconds to see this video by garip ay from minute 3:00 up to 3:30:
I understand how to make more than one fluid domain to create different colors but I can't think of a way to simulate the interaction between them.
Maybe there's a way to do this with dynamic paint... I just haven't used that tool very much.
Since this is a flat image it could also be done with some clever texturing... maybe?
How could I do something like this in blender?