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Focus / DAY 008

Hue Hunt

One tile is a slightly different shade. It gets smaller every round.

How to play
  1. 1

    Every tile is the same colour — except one.

  2. 2

    Tap the odd tile before the bar runs out.

  3. 3

    Each round the grid grows and the difference shrinks. Three misses and you're out.

WHY IT WORKS

Why it works

This is a colour discrimination challenge: how fine a difference in hue you can still pick out. It is a game, not a vision test — your screen, brightness and the light in the room all move the result, so treat the number as a score rather than anything about your eyes.

FAQ

What round is good?

Round 7 is sharp and round 9 is exceptional. By then the difference is close to what a phone screen can even display.

Why does my score change between sessions?

Screen brightness, night-shift filters and ambient light all shift colour perception. Play in consistent lighting if you want to compare runs.

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