Ishihara Color Vision Test Online

Professional color blindness test with 92% accuracy

Take the Ishihara color vision test online. Fast and accurate color blindness screening in English. No sign-up, instant results and clear explanations.

How the Ishihara Test Works

The Ishihara color vision test is the world's most widely used screening tool for detecting red-green color blindness. It uses specially designed plates where numbers or shapes are hidden in patterns of colored dots.

  1. 1. Look at each plate: A circular pattern of colored dots will appear. A number is hidden inside the pattern, visible to people with normal color vision.
  2. 2. Identify the number: Select the number you see from the options provided. If you can't see any number, you can indicate that as well.
  3. 3. Answer within the time limit: Each plate has a time limit (10-15 seconds depending on difficulty). Answer quickly for the most accurate screening result.
  4. 4. Get your results: After completing all plates, you'll receive an instant assessment of your color vision, along with a detailed breakdown and downloadable PDF report.

Who Should Take the Ishihara Test

Color vision deficiency affects approximately 1 in 12 men and 1 in 200 women worldwide. Many people are unaware they have it. This test is useful for:

  • Drivers and pilots: Color vision is critical for reading traffic signals, navigation lights, and warning signs.
  • Employers and HR teams: Pre-employment screening for roles where color identification matters (electrical work, aviation, medical fields, transportation).
  • Students and parents: Early detection helps with learning accommodations and career guidance for children.
  • Designers and creative professionals: Understanding your own color perception helps create designs that work for all audiences.
  • Anyone curious: If you've ever wondered whether you see colors the same way others do, this screening test gives you an immediate indication.

Types of Color Vision Deficiency

There are several types of color vision deficiency, each caused by a different issue with the cone cells in the retina:

Deuteranopia / Deuteranomaly
The most common type (about 6% of men). Caused by missing or altered M-cones (medium wavelength). People with deuteranopia have difficulty distinguishing green from red and related hues.
Protanopia / Protanomaly
Affects about 2% of men. Caused by missing or altered L-cones (long wavelength). Red appears darker and can be confused with black, brown, or dark green.
Tritanopia / Tritanomaly
Very rare (less than 0.01% of population). Caused by missing or altered S-cones (short wavelength). Blue and yellow become difficult to distinguish.
Monochromacy
Complete color blindness - seeing only in shades of gray. Extremely rare (affects about 1 in 30,000 people).

Frequently Asked Questions

Is this online test clinically valid?

This is a screening tool, not a clinical diagnostic. It provides a quick indication of whether you may have a color vision deficiency. For a definitive diagnosis, especially for occupational or medical purposes, consult a qualified ophthalmologist or optometrist who can administer a validated physical Ishihara test.

How long does the test take?

The test takes about 2-3 minutes depending on the difficulty level you choose. Easy mode has 10 plates, medium has 15, and hard has 20 plates.

Is the test free?

Yes, completely free. No account, no sign-up, no payment required. You can take the test as many times as you want.

Can I retake the test?

Yes, you can retake the test anytime. Each test generates new random plates, so your results are based on a fresh sample each time.

What happens if the results suggest color blindness?

Don't panic. A screening result indicating possible color vision deficiency is an invitation to get professionally examined, not a diagnosis. Make an appointment with an eye care professional who can confirm with certified clinical tests.

Can display settings affect accuracy?

Yes. Screen color calibration, brightness, ambient lighting, and even the device (phone vs. laptop vs. professional monitor) can influence results. For best accuracy, take the test on a color-calibrated display in a moderately lit room.

Is my data private?

Yes. We store anonymous test results (score, language, country at country level) for statistical purposes. We never collect personal information, email, or anything identifying. See our Privacy Policy for details.