Disclaimer. Your screen, lighting, viewing distance and vision correction affect this activity. It cannot confirm or rule out color vision differences or determine a clinical vision prescription. Full disclaimer

Color Discrimination Challenge

Find the shape hidden in a field of coloured dots.

Informal challenge · not a health screening

A free color discrimination challenge. Find the shape hidden among coloured dots. Your score is a raw count of shapes found. Screens are not colour calibrated, so this activity cannot diagnose, confirm or rule out color blindness.

Choose a level to startEntryStart here6 experimental figures, untimed.Regular20 figures with documented colour pairs that are a little closer together than Entry.Hard20 figures with closer colour pairs and more varied dot brightness, still comfortable to view. Harder only means a harder game, never a clinical category.

Start testAbout 2 minutes · demo and practice first

What it measures

How many hidden shapes you identify among dotted figures that use uncalibrated screen colours.

DurationAbout 2 minutes

Format6 experimental colour figures, untimed

Device and setupUse your usual vision correction, normal lighting and a comfortable viewing distance.

Accessibility limitsDepends on colour perception by design. Results on this activity are not comparable across screens.

Free resultShapes matched out of 6

PrivacyYour answers are never sent to advertisers. Signed in, your results are saved to your account.

How the score works

A raw count of shapes matched. No pass or fail label and no diagnostic classification.

Worked example

If you correctly name the hidden shape in 5 of the 6 Entry figures, your result is 5 / 6. There is no pass or fail and no type of colour vision is inferred from a missed figure.

Entry, Regular and Hard

Entry: 6 experimental figures, untimed.
Regular: 20 figures with documented colour pairs that are a little closer together than Entry.
Hard: 20 figures with closer colour pairs and more varied dot brightness, still comfortable to view. Harder only means a harder game, never a clinical category.

Each level has its own fixed set of items and its own score, so results are only compared within the same level. How levels are designed

What Premium adds

Your basic score is always free. Premium adds: Palette breakdown and limitations. It also keeps your full history on every device and removes the ads. One upgrade covers all ten tests. See Premium

Limits

Your screen, lighting, viewing distance and vision correction affect this activity. It cannot confirm or rule out color vision differences or determine a clinical vision prescription.

For education, entertainment and general self-exploration only. These activities are not medical or psychological assessments and do not diagnose, prevent or treat any condition. Results are estimates of performance on these tasks and can be affected by practice, attention, language, your device and your surroundings. If you have concerns about your thinking, vision or hearing, consult a qualified healthcare professional.

Questions

Can this test diagnose color blindness?

No. Screen colours, brightness, lighting and viewing angle all vary, and the figures are not a clinical plate test. An eye care professional can test colour vision properly.

Why might I miss a shape with normal colour vision?

Some screens show these colours very close together, and lighting or night mode can shift them further.

Should I turn off night mode?

Yes. Turn off night or blue-light filters and use your usual brightness for the most consistent results on your device.

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Made and maintained by ChowChow Labs. Content last reviewed October 23, 2026. Methodology and changelog · Report a problem