About Color Sort
Color Sort (also known as Water Sort or Tube Sort) blew up on mobile in 2020 — a puzzle so simple in concept that most players don't notice it's actually a constraint-satisfaction problem in disguise.
Why it's harder than it looks
Each move reduces your options. Pour the wrong color first and you can lock yourself out of solutions. The 2 empty tubes are your scratch space — use them sparingly and strategically.
Strategy
- Free up a tube before splitting colors. Don't split a 4-of-a-kind tube unless you have an open destination.
- Track your empty space. If both empty tubes get filled with mixed colors, you usually have to restart.
How to play
Click a tube to pick it up (it lifts). Click another tube to pour the top color from the lifted tube into it. You can only pour onto an empty space or onto the same color. Sort each tube to one solid color.