Color Blindness Test

The Color Blindness Test is a free online test from Science of Apps that takes about 4 minutes. It screens your colour vision with 12 pseudo-isochromatic dot plates in the style of the Ishihara test — a digit hidden in coloured dots that people with typical colour vision can read — covering red-green (protan and deutan) and blue-yellow (tritan) deficiencies, with control plates everyone should see. A screening, not a diagnosis. You get your result straight away and a verifiable Colour Vision Screening result card (SOA-CBT).

Science of Apps offers a free Color Blindness Test, updated for 2026 and 2027. It measures red-green and blue-yellow colour vision screening with Ishihara-style plates and gives instant results with a shareable certificate.

Start it on this page — no fee or sign-up. It takes about 4 minutes on a computer or phone. Look at each plate at a comfortable distance, with screen brightness up and night mode or blue-light filters off. Choose the digit you see, or "Nothing" if you can't see one. Don't spend more than a few seconds on each. Add your name at the end to get a verifiable Colour Vision Screening result card, on screen, as a PDF and by email.

People who suspect they are colour blind, Parents curious about a child's colour vision, Designers checking their own vision, Job seekers for roles with colour vision requirements and Students. It is a quick, self-administered online measure for curiosity, practice and self-awareness in 2026 and 2027 — not a medical or diagnostic test.

Red-green colour vision deficiency affects about 1 in 12 men and 1 in 200 women of Northern European descent, according to the US National Eye Institute. Blue-yellow deficiency is much rarer.

It is a useful screening, but screens vary in colour and brightness, so results are not a diagnosis. If plates are hard to read, see an optometrist, who can test with calibrated plates and anomaloscopes.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

About 4 minutes, untimed. There is no pass mark: you get your measured result, which you can retake any time to compare.

No. It is a self-administered online measure for curiosity and practice. Results depend on your device, screen and conditions, so if any plates were hard to read, see an optometrist for a full colour vision examination.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.