Discover how you see the world.
Take our free, professional-grade colour blind tests online. Ishihara, Farnsworth 100 Hue, and D-15 Dichotomous — no account required, completely private.
Select your test.
Choose the assessment that fits your needs.
Ishihara Test
The world's most used colour blindness screening test. 24 diagnostic plates reveal red-green deficiencies.
- 3–5 minutes
- Red-green CVD detection
- CVD type classification
Farnsworth 100 Hue
Arrange 40 colour caps in order of hue. Results shown as a polar error chart with confusion axis.
- 10–15 minutes
- Full spectrum analysis
- Polar error chart result
D-15 Dichotomous
Fast occupational screening test. Arrange 15 colour discs to receive a Pass/Fail result with confusion axis.
- ~2 minutes
- Occupational screening
- Pass / Fail result
Free accessibility tools
For designers, developers, and curious minds.
Built for clarity and precision.
No pop-ups. No hidden fees. No account required. Just clear insights into your colour vision.
Instant Results
Get immediate feedback with detailed CVD classification and what your results mean.
Accessible
Keyboard navigable, screen-reader friendly, and designed for everyone.
Private
All tests run locally in your browser. We never see your health data.
Learn about colour blindness
Evidence-based guides for patients, parents, and designers.