Free Color Blind Test Online
18 Ishihara-style plates · results in under 2 minutes · no signup required
Free Online Color Blindness Test
Take our free Ishihara color blind test to check for red-green color blindness, deuteranopia, protanopia, and tritanopia. Get instant results with our scientifically-designed 18-plate color vision screening test. No registration required.
- Disable dark mode and blue-light filters (Night Shift, f.lux)
- Set screen brightness to at least 80%
- Ensure you are in a neutral lighting environment
- View screen from a normal reading distance
About This Free Online Color Blind Test
This free color blind test uses 18 Ishihara-style plates to screen for color vision deficiency (CVD). Each plate shows a number formed by dots of one color against a background of dots in a contrasting color. People with normal color vision can read the number; people with red-green or blue-yellow color blindness see a different number or nothing at all.
The test takes under 2 minutes to complete. Results appear instantly and are never stored or shared.
What Types of Color Blindness Does This Test Detect?
- Deuteranopia the most common form of red-green color blindness (green-blind). Greens and reds appear similar, shifting toward yellow or brown. Affects ~6% of men.
- Protanopia red-blind color vision. Reds appear very dark or black; red and green are easily confused. Affects ~2% of men.
- Tritanopia blue-yellow color blindness. Blues appear greenish; yellows shift toward pink. Affects men and women equally but is much rarer.
- Mild / partial CVD most people with color blindness have a partial rather than complete deficiency. The test includes severity plates to distinguish mild from strong CVD.
Is This a Medical Diagnosis?
No. This is a free online screening tool, not a clinical diagnosis. A screen-based test cannot match the precision of a professionally administered color vision test under controlled lighting. If you score as potentially color blind, consult an optometrist or ophthalmologist for a clinical assessment - especially if you work in a color-critical profession such as aviation, electrical work, or medicine.
What Should Designers Do After Testing?
If you're a designer or developer, take the test first to understand color blindness from the user's perspective. Then use our color blindness simulator to upload your designs and see how they look under each CVD type. This combination is the fastest way to audit visual content for WCAG 1.4.1 (Use of Color) compliance.
Frequently Asked Questions
Am I color blind?
Take the free test above to find out in under 2 minutes. Results are instant and no account is required.
Is this test accurate?
Our test uses Ishihara-style plates based on peer-reviewed research and is highly accurate for screening red-green color blindness. For a formal clinical diagnosis, consult an optometrist.
Is my data private?
Yes. Everything is processed locally in your browser. No test data or images are sent to our servers.
How long does the test take?
Under 2 minutes. There are 18 plates and results are shown immediately.