Online Color Blindness Test

If you have color blindness, our test can tell you if your color vision deficiency is mild, moderate, or strong in less than two minutes.

Before taking the test

All Color Blind plate tests, are not performance evaluation tools and are NOT designed to be taken with glasses with colored lenses of any kind. As a result, please be sure to do the following BEFORE taking the test:

Remove all glasses with colored lenses. The test is designed to be taken with the naked eye or with a prescription if you wear one. It will not work with colored lenses of any type and will lead to inaccurate results. Taking the online test with color correcting glasses to “prove” that they work is a misconception and inaccurate.
Turn brightness on screen to high. Light affects color and the ability to perceive differentiation.

About the Color Blind Test

The Color Blind Test is a proprietary color blind test designed to determine a person’s type and level of color blindness. Created by colorblindnesstest.org, an independent company based in California, the color blind test is the #1 online Color Blind tool for color vision deficiency taken by more than one million people worldwide.

The test is based on the Ishihara “hidden digit” test method and is combined with a computer-adaptive algorithm to measure the type and level of color vision deficiency (CVD). It is available in a numbers mode for adults and children ages 10+ and in a shape mode for kids ages 5+. The three main types of color blindness are Deutan, Protan, and Tritan. Learn more about the different types of color blindness.

What is a color blind test?

A color blind test checks if you can accurately see colors. If you cannot pass the test, you have a form of color blindness. Most color blind tests are screening tests. They can detect color blindness but cannot determine how severe it is. More in-depth color blind testing is needed for that.

Color blind tests can identify children who might have trouble recognizing colors. This could be a factor in certain activities in school and at home.

These tests can also identify people who might struggle at jobs that require excellent color vision.

Color blind tests: Screening

A very popular screening test for detecting the presence of color blindness is the Ishihara Color Vision Test.

Shinobu Ishihara, a Japanese ophthalmologist, developed the test more than 100 years ago. It can quickly detect red-green color blindness (the most common color vision deficiency).

The Ishihara test consists of several circular images (or "plates"). Each image contains many dots of various colors, brightness and sizes.

A person who has normal color vision will be able to detect a visible number "hiding" within the array of dots.

But someone with red-green color blindness won't be able to see the number. Instead, they will see:

  • A random pattern of dots, or
  • A number different than the one seen by a person with normal color vision.

The complete Ishihara color blind test contains 38 plates. A shorter version of the test (with fewer plates) may be used during an eye exam to screen for color blindness.

The screening takes place under normal room lighting. If you need prescription glasses, you will wear them for this test.

If you fail the Ishihara Color Vision Test, your eye doctor will discuss this with you and whether a more detailed color blind test is recommended.

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