Pigments behave like real liquid — density layers, oil resists water, siphons drain and chambers overflow. Hit the target colour across 4000 hand-built levels.
Heavier pigments sink, lighter ones float. Stack them in the right order and a single chamber holds a whole spectrum.
Some fluids refuse to blend. Use immiscibility to wall off a colour — or to keep two from ever touching.
Drain a chamber from the bottom, spill it over the top. Every pour cascades, so plan the order, not just the colour.