About Colour Tubes

Colour Tubes belongs to the water-sort puzzle genre that took off on phones around 2020, sometimes called Water Sort or Ball Sort — pour from one tube into another until each one holds a single colour.

Every colour fills exactly 4 tubes and there are always 2 empty tubes to work with. Difficulty only picks your starting level — Easy at level 1, Normal at level 5, Hard at level 9 — and a new colour is added every 2 levels from there, so the puzzle keeps growing instead of resetting. Three skins — Water, Balls and Goods — show the exact same puzzle in different styles.

Tips

• Work backward from a tube that's one pour away from finished — clearing it frees up space for everything else.
• Keep at least one tube empty as long as you can; it's your only real flexibility once the board fills up.
• Use Hint if you're stuck rather than guessing — a wrong pour still costs you a move once you Undo it.

Every round you finish is checked against the global Colour Tubes Top 10 above — no account needed, just a name the first time you place.