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

Find the shape hidden in a field of coloured dots.

Start testAbout 2 minutes · demo and practice first

Informal challenge · not a health screening

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 it is scored

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

Starter content, version 1. Difficulty is provisional until pilot data supports it. Full methodology

What Premium adds

Palette breakdown and limitations. 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.