Odd One Out
LiveA grid of identical tiles hides one that is a slightly different shade. Clear it and the next grid grows while the shade gets closer. One wrong tap ends the run.
Solo run
Can you spot the shade that is off?
One tile in every grid is a slightly different colour. Find it and the next grid is bigger, with a closer shade. One wrong tap ends the run.
No personal best saved yet — this run can set one.
How to play
- 1
One tile is a shade off
Every grid is filled with the same colour except one tile. It is a different shade — sometimes only just.
- 2
Tap it
Find the odd tile and tap it. A 2×2 grid starts you off, so the first one is generous.
- 3
It gets harder both ways
Clear a grid and the next one either grows — up to 7×7 — or brings the odd shade closer to the rest. Usually both.
- 4
One wrong tap ends it
Your score is how many grids you cleared in a row. The shade you missed is revealed when the run ends.
Works with a mouse, a touchscreen or a keyboard. Tap or click a tile, or Tab to one and press Space or Enter. Taps are ignored for a moment after each grid.
How many grids is good?
Seven or eight grids is a strong run. Past ten, the shade difference is only a couple of percent of lightness, which is around the limit of what an eye can separate on a screen — at that point you are reading the edges of tiles rather than the colours themselves.
2 gridsWarming up
The early shades are close — most first runs land here.
5 gridsSolid
A normal, focused run.
8 gridsSharp
You are scanning in patches, not tile by tile.
11+Eagle eyed
Rare. Genuinely worth sharing.
Do not scan tile by tile — that is what the clock punishes. Pick a patch, compare every tile in it to the first one, then move on.
Why colour, not shapes?
A shape difference is a search — you can hunt it corner to corner. A shade difference has to be seen, so it rewards a calm eye rather than a fast one. Every grid is built round a single hue, so nothing on screen gives the answer away except the colour itself.
Play it with a group
In Tournament mode everyone takes one run and passes the device on, with a handover screen before each turn. Standings rank the grids cleared, and a tie goes to the quicker run. Your personal best lives in this browser only — no account needed.
Screen brightness and the light in the room both change how a shade reads, so a run on a phone at dusk is a fair contest, not a laboratory measurement.
Tip: look slightly beside a tile rather than straight at it — peripheral vision is better at picking out small colour differences.