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Level reached
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Turtle
HUMAN SPEC · Perception · up to 60 seconds
Colour Perception Test
Matching outfits, editing photos, picking a foundation shade. The precision of your eyes.
Colour
Matching outfits, editing photos, picking a foundation shade. The precision of your eyes.
One tile is a slightly different shade. Click it.
Find the odd tile
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Baselines are initial values and will be updated as real data accumulates.
HALL OF FAME
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Gear for this ability
144Hz+ monitor
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HALL OF FAME
Hall of Fame
Only the top 10 get their name up. No login, weekly and all-time.
| # | Nickname (2 to 12 characters) | Level reached |
|---|
01
How it works
- One tile is a slightly different shade. Click it.
- Correct picks advance a level. The grid grows and the difference shrinks.
- Three mistakes or 60 seconds ends the test. Your record is the level you reached.
02
About this test
Human eyes are especially sensitive to brightness. Under good conditions we can tell apart a 1 to 2 percent lightness difference. This test hides one slightly lighter or darker tile among identical ones and narrows the gap each level. Passing level 20 puts you in the top 40 percent, level 30 in the top 5.
Colour discrimination is genuinely assessed in design, photography, printing and cosmetics. Screen brightness and ambient light affect it, so sit square to the screen in soft, even light.
03
Benchmarks
| Result | Top % |
|---|---|
| Level 1 | 99.5% |
| Level 3 | 98% |
| Level 5 | 95% |
| Level 8 | 88% |
| Level 10 | 80% |
| Level 13 | 70% |
| Level 15 | 60% |
| Level 18 | 50% |
| Level 20 | 40% |
| Level 22 | 32% |
| Level 24 | 25% |
| Level 26 | 18% |
| Level 27 | 12% |
| Level 29 | 7% |
| Level 30 | 4% |
| Level 33 | 1% |
| Level 40 | 0.1% |
Baselines are initial values and will be updated as real data accumulates.
04
In everyday life
- Shopping: noticing that the colour on screen is not the colour in the box.
- Photo and video: catching subtle tone differences when editing.
- Fashion and beauty: pairing colours, choosing a foundation shade.
05
FAQ
Is it unfair to colour blind people?
The test uses lightness, not hue, so red-green colour blindness is not a big disadvantage. It is not a colour blindness diagnostic.
Does the monitor matter?
Yes. Brightness, gamma and viewing angle all matter. Face the screen directly and turn off night mode.
Can I train it?
A little. Practice adds 2 to 5 levels of technique. Your eyes themselves do not change.
References
Other tests in this series
View the Human Spec series01ReactionSlamming the brakes, catching a falling cup. We measure that 0.2 seconds.about 30 secondsReflex. Tap when it turns green02Click speedTicket drops, refresh wars, course registration. How fast is that finger?10 secondsSpeed. Click fast for 10 seconds03TypingHow fast you reply, how fast you finish the report. Your fingers, measured.30 secondsDexterity. Type the passage for 30s04Number memoryCan you remember a phone number after hearing it once? That is what we measure.about 2 minutesMemory. Memorize digits, type them