A moment for your vision
Color vision test
Identify numbers in colored dots with a quick or full check.
- About 1–3 min
- No sign-up
For screening only. This does not replace a professional eye exam.
Set neutral colors
Turn off screen color filters.
Choose a mode
Try six or fifteen plates.
Read the numbers
Select what you can distinguish.
A simple guide
Before you start
How to get a more useful color vision result
Online color testing depends heavily on your display. Use a normal screen brightness, turn off Night Shift or other blue-light modes, disable accessibility color filters, avoid strong glare, and look at the screen straight on. If your display has an unusually warm, cool, or vivid color profile, the result may be less reliable.
The full version samples red–green and blue–yellow patterns several times, so one accidental answer has less influence on your overall screen.
What does a color blind test check?
Color vision deficiency, often called color blindness, means certain colors are harder to distinguish than they are for most people. The most common inherited differences affect red and green. Blue–yellow differences are less common, and complete absence of color vision is rare.
Color-plate tests use patterns made from many colored dots. A number or shape is formed by dots with a different color relationship from the background. If those colors fall along a confusion pattern for a viewer, the number may become difficult to identify. This page uses computer-generated pseudoisochromatic, Ishihara-style plates for screening; it is not a reproduction of a standardized clinical Ishihara test.
Red–green, protan, deutan and blue–yellow differences
Protan-type
Protan color vision differences affect perception related to red-sensitive cone responses. Reds can appear darker and some red–green combinations can be difficult to separate.
Deutan-type
Deutan differences affect perception related to green-sensitive cone responses. They are the most common red–green color vision differences.
Tritan-type
Tritan differences involve blue–yellow discrimination and are much less common than inherited red–green deficiencies.
How accurate is an online color blind test?
A browser-based test can be useful as an initial screen, especially when several plates produce a consistent pattern. It cannot control your display calibration, ambient lighting, device color management, viewing angle, or the exact printed colors used by standardized clinical tests.
If you repeatedly have difficulty with color plates, if color perception has changed recently, or if color discrimination matters for work or licensing, arrange a professional eye examination. An eye-care professional can use standardized color plates and other methods such as hue arrangement testing when needed.
Color blind test FAQ
Is this an Ishihara test?
This test uses computer-generated pseudoisochromatic plates inspired by the color-dot approach used in Ishihara testing. It is not an official or standardized Ishihara plate set, so it should be used only as an online screening tool.
Can an online color blind test diagnose color blindness?
No. It can flag a pattern that may be worth checking, but diagnosis requires standardized testing interpreted by an eye-care professional.
Why should I turn off Night Shift or blue-light filters?
Those settings intentionally change the colors produced by your display. Because this test depends on color differences, they can make the result less reliable.
What is the most common type of color blindness?
Red–green color vision deficiency is the most common group. Protan and deutan differences are both within this red–green category.
What if my color vision changed recently?
A new or one-sided change in color perception should not be evaluated only with an online test. Arrange a professional eye examination because acquired color-vision changes can have different causes from inherited color vision deficiency.
Medical reference
For clinical information about color vision deficiency and professional testing, see the National Eye Institute.
NEI color vision testing guide