Hueman is a colour perception game. Each round shows a grid of nearly identical tiles, with one that is slightly different. Find it before time runs out. As you advance, the colour difference shrinks, the grid grows, and the timer gets shorter. You have three lives, and your score is the level where you lose one.
Tap Start. Level one begins with about ten seconds on the clock. Find the tile that differs from the others and tap it.
A correct tap clears the tile and advances you to the next level. The grid grows from four tiles to nine, sixteen, twenty-five, and finally thirty-six, while the timer shortens slightly each time. A wrong tap or running out of time costs one life and restarts the current level. Lose all three lives, and the run ends. Your final level is the score you share.
The colour gap, grid size and clock change on every level, so each run ends when your eyes can no longer resolve the difference. That makes the score a meaningful measure of how long you lasted. A game takes about two minutes, requires no account, and ends with a card showing where you lost each life.
The developers describe it as a game rather than a colour vision test. The shade differences involve brightness as well as hue, keeping it playable for most people with colour vision deficiency. It is free and ad-supported. Paid credits buy extra ranked attempts on a separate board, but do not make the odd tile easier to see.
Reading the feedback
The answer is marked immediately. A correct answer clears the tile and brings up the next grid. A wrong answer turns one of the three dots at the top dark. There is no partial credit or second look. The end card shows the levels cleared, run duration, daily percentile, and the level where each life was lost.
Modes
Daily puzzle
This is the ranked run. Everyone gets the same puzzle each day, and only the first attempt counts on the Daily board. Once submitted, it cannot be changed.
Practice round
You get one free, unranked attempt each day, using random colours instead of that day’s puzzle. It does not affect your streak, stats, or leaderboard position.
Unlimited
A second board ranks your best run of the day instead of your first. Every free player appears on it automatically with one run. Paid credits buy extra attempts at the same puzzle and optional handicaps, such as an extra life or a slower clock. They never increase the colour difference.
Archive
Every previous daily puzzle is numbered, dated, and playable from one index.
Tips for higher scores
Sweep your eyes across the grid instead of staring at one tile. The difference comes from comparison, so moving across the board is faster than checking candidates one by one.
Check the edges and corners. On larger boards, a tile with only two or three neighbours is easier to judge than one surrounded on all sides. The odd tile can appear anywhere.
Use your practice round before the real one when you feel rusty. It costs nothing, does not affect the rankings, and helps calibrate your eyes before the run that counts.
Screen brightness and glare matter. Later levels use differences small enough that a dimmed phone in sunlight can cost you a life when a decent screen would not.
If you lose a life, you restart the same level rather than the whole run. Panic-tapping to beat the clock is what usually ends runs early.
Common questions
How many lives do I get?
Three. A wrong tap costs one life, as does letting the timer run out. Losing a life sends you back to the same level instead of ending the run.
How is my score worked out?
Your score is the last level you cleared. There is no separate points system.
How long do I get per level?
You get around ten seconds on level one, with slightly less time on each level after that. The grid also grows, so later levels give you more tiles to search in less time.
Is everyone playing the same puzzle?
Yes. A new puzzle goes live at midnight UTC, and everyone sees the same one worldwide. That makes the daily leaderboard comparable.
Is this a colour blindness test?
No. The site states that it is a game and cannot diagnose anything. The differences include changes in brightness as well as hue, so the game remains playable for most people with colour vision deficiency.
Can I play more than once a day?
Yes. You get one free unranked practice round each day. Unlimited lets you replay the same puzzle on a separate board. Only your first run counts on the Daily board.
Do I need an account?
No. Your streak, best level, and history stay in that browser on that device. Clearing site data or switching devices resets your record.