Professional Ishihara Color Blindness Test - Free Online Vision Screening

Complete a free online color blindness test with 16 Ishihara-style plates in about 3 minutes. No sign-in is required, and your screening results appear instantly on this page.

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Learn About Color Blindness

PRIVATE, IN-BROWSER SCREENING

Free Online Color Blindness Test

Choose what you see on each plate. Your answers stay on this page and the result appears immediately.

A quick Ishihara-style screening with 16 color plates

Color plates

16 questions

Estimated time

About 3 minutes

Screening type

Ishihara-style plates

No sign-in required. Answers are not saved or sent to a server.

Why Use This Online Color Blindness Test?

A focused, browser-based color vision screening designed to make the test process clear, private, and easy to understand.

16 Ishihara-Style Color Plates

Work through 16 Ishihara-style color plates in a consistent sequence. For each plate, choose the number you can see or select “Nothing” before moving to the next one.

Focused Red-Green Color Vision Screening

The plate patterns focus on possible red-green color vision differences, the most common form of color vision deficiency. This online test is a screening, not a diagnosis.

Instant, Private Results

See your screening summary immediately without creating an account. Your answers stay in the current browser session and are not saved or sent to a server.

How the Online Color Blindness Test Works

Complete the free online screening in three straightforward steps. No camera, account, special calibration hardware, or answer upload is required.

  1. Prepare Your Screen

    Use a reliable phone, tablet, or computer display at a comfortable brightness. Turn off night mode and color filters, then reduce glare and strong reflections.

  2. View Each Ishihara-Style Plate

    Look at each of the 16 Ishihara-style plates and select the number you actually see. If no number is visible, choose “Nothing” rather than guessing.

  3. Get Your Screening Summary

    After the final plate, receive an immediate screening summary with a plain-language explanation and guidance on when to consider a professional color vision test.

What This Test Can and Cannot Tell You

Ishihara-style plates can reveal useful red-green screening patterns, but an online display cannot reproduce the controlled conditions of a clinical color vision examination.

Red-Green Color Vision Differences

This screening focuses on answer patterns that may be associated with red-green color vision differences. It does not establish a diagnosis, subtype, or level of severity.

Limits of Online Color Vision Screening

The result cannot exclude every color vision problem and does not screen for blue-yellow color vision deficiency. A professional examination may use calibrated materials and additional test methods.

Display and Viewing Conditions

Screen brightness, ambient light, glare, night mode, color filters, display quality, and viewing distance can change how a plate appears and influence your answers.

Understanding Your Color Blindness Test Results

Use the screening summary as a starting point. It describes patterns in your answers but cannot confirm or rule out a color vision condition.

01

No Obvious Red-Green Difference Detected

Your answers did not show a clear red-green difference pattern in this screening. This does not rule out every color vision issue or guarantee that color perception is typical in all situations.

02

Possible Red-Green Color Vision Difference

Your answers showed a pattern that may be associated with a red-green color vision difference. The result is a screening signal, not a diagnosis of a specific type or severity.

03

When to Get a Professional Color Vision Test

Contact an optometrist or eye care professional if you notice a recent change, have ongoing concerns, or need an accepted result for driving, education, or employment.

About Color Blindness

Color vision deficiency affects how people distinguish certain colors. The most common patterns involve red and green, while other forms are much rarer.

About 1 in 12 men and 1 in 200 women

Red-Green Color Vision Deficiency

Among people with Northern European ancestry, red-green color vision deficiency affects males more often than females and can make some reds, greens, yellows, and browns harder to distinguish.

Fewer than 1 in 10,000 people

Blue-Yellow Color Vision Deficiency

This rare color vision difference occurs in males and females at similar rates and can affect distinctions between blue and green or dark blue and black. This screening does not test for it.

About 1 in 30,000 people

Achromatopsia (Complete Color Blindness)

Achromatopsia is a rare inherited condition that can greatly reduce or eliminate color perception and may also involve light sensitivity, involuntary eye movements, or reduced visual acuity.

Sources and Medical References

The educational information on this page is informed by established public health and medical reference materials about color vision deficiency.

National Eye Institute

An overview of color blindness symptoms, types, testing, and treatment from the U.S. National Eye Institute.

View the NEI resource

MedlinePlus Genetics

Genetics-focused information about inherited color vision deficiency, its frequency, and inheritance patterns.

View the MedlinePlus Genetics resource

NHS

Patient guidance on recognizing color vision deficiency, testing options, causes, and everyday considerations.

View the NHS resource

These references support general education and further reading. Their inclusion does not mean the organizations reviewed or endorsed this online screening.

Frequently Asked Questions

Practical answers about online color vision screening, result meaning, and when to seek a professional test.