Huedoku (BuzzFeed)

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Sudoku with six colours instead of numbers, one grid a day.

on buzzfeed.com

Part of a Huedoku board: two 2x3 boxes of coloured squares in red, orange, yellow, green, blue, purple and blank white, some marked with a dot

Huedoku is BuzzFeed's daily colour sudoku. Each day there is an Easy 6x6 grid with six colours and a Hard 9x9 grid with nine; some squares start coloured, and you fill the rest so every row, column and box holds each colour exactly once.

About Huedoku (BuzzFeed)

Huedoku is one of the daily games on BuzzFeed Games, the site's puzzle section, and each puzzle is numbered and dated: number 132 fell on 3 October 2026, so it began in the spring of that year.

The rules are those of sudoku, with colours as the symbols. Each day has two modes. Easy is six squares by six, divided into six boxes of two rows by three columns, with red, orange, yellow, green, blue and purple. Hard is the full 9x9 sudoku board with 3x3 boxes and nine colours. Some squares are filled from the start. You pick a colour from the palette and tap an empty square to fill it, until every row, every column and every box contains each colour once.

Because there is nothing to read, it is quick to pick up, and the 6x6 Easy grid makes a short daily solve, with the 9x9 Hard grid for a longer one. A Check button highlights wrong cells, and a Reveal unlocks after five minutes. Past puzzles are in an archive, and the page can notify you when the next one drops. The site carries ads.

It suits sudoku players who want a lighter daily grid, and anyone who finds colours easier to scan than digits.

How to play Huedoku (BuzzFeed)

Open today's Huedoku on BuzzFeed Games and choose Easy (6x6, six colours) or Hard (9x9, nine colours).
Look at the coloured squares already placed in the 6x6 grid.
Tap a colour in the palette to select it, then tap an empty square to fill it.
Make sure each row, column and box ends with every colour once.
Fill the whole grid to finish the day's puzzle.

Screenshots

Huedoku's Hard mode: a 9x9 grid of 3x3 boxes with some squares coloured in nine colours and the colour palette below

Tips

Start with the rows, columns or boxes that already have four or five colours.
A colour missing from a box can often go in only one square once you check its row and column.
Scan one colour at a time across the whole board, as you would a digit in sudoku.