DARK BULB
EN
Coloroku app icon

Coloroku

Sudoku with colours.

Swap the numbers for glowing dots. Fill the grid so every row, column and box holds each colour once, chain your moves into combos, and watch the whole board light up.

Coming soon on theApp StoreComing soon onGoogle Play
A 6×6 Coloroku board halfway through, with a combo lighting up a column.

How a level plays

  1. The Coloroku home screen with the logo, the Start button, Levels and Time Attack.

    1Pick a grid

    72 levels from a gentle 4×4 to a tricky 9×9, plus Time Attack when you fancy a race.

  2. A 6×6 board mid-game with a ×3 combo.

    2Place the dots

    Drag a dot onto the board, or tap a colour and then the spots. Quick moves build a combo.

  3. Grid lit: two stars and 2420 points.

    3Light the grid

    Fill the last spot and the whole grid lights up. Fewer fizzles, more stars.

  4. The skins screen with Autumn, Neon and Symbols.

    4Make it yours

    Earn stars to unlock skins: marbles, flags, animals, fruit, and free seasonal ones.

Three rules. One bright grid.

Know sudoku? Then you know Coloroku. Never played? The one-minute tutorial shows you.

  1. 1Every row holds each colour once.
  2. 2Every column holds each colour once.
  3. 3Every box holds each colour once. On 5×5 and 7×7 the boxes are jigsaw shapes.

Arcade feel

Flares, combos, sparks and a chiptune beat. Every dot lands with a pop.

Time Attack

A fresh grid every run and a clock ticking down. Finish fast for a speed bonus.

13 skins

From neon bulbs to dogs and cats. Symbols gives every colour its own shape, for colour-blind players.

No ads, no tracking

Plays offline, needs no account and keeps your progress on your device.

Five languages

English, Nederlands, Deutsch, Français and Español, in light or dark mode.

Coming soon to iPhone, iPad and Android.

Questions about Coloroku? See support or our privacy policy.