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Free Color Blind Test
The "EnChroma test" people mean is a free online color-blindness screening that checks whether you have a red-green deficiency and roughly how strong it is — often used to suggest a lens. You do not need a specific brand to get that answer. This free color blind test screens for a deficiency, estimates your type (protan, deutan, or tritan) and degree, takes about two minutes, and asks for no email and no purchase.
If you searched for the EnChroma test, you probably want one thing: a quick read on whether you're color blind and which kind. That is a standard color-vision screening — pseudo-isochromatic plates plus a cone-contrast check — and it is not tied to any product. Here is what the test measures, how much trust to put in an on-screen result, and a free version you can take right now.
Free test vs a branded lens-finder test
What a color-vision screening should give you, and how this free test lines up with the typical product-linked one.
| Feature | This free test | Typical branded test |
|---|---|---|
| Price | Free | Usually free |
| Sign-up or email | None | Sometimes required |
| Screens for a deficiency | Yes | Yes |
| Estimates type (protan / deutan / tritan) | Yes | Often red-green only |
| Estimates degree | Yes, three bands | Varies |
| Method | Ishihara-style plates + cone-contrast | Plate-style screening |
| Tied to buying anything | No | Often recommends a product |
What is the EnChroma test?
It's a free online color-blindness screening. You look at a series of colored-dot plates, enter what you can read, and it estimates whether you have a red-green deficiency and how strong it is — commonly to suggest which lens might suit you. The basic method is pseudo-isochromatic plates: a figure hidden in dots that normal red-green vision separates and a deficiency does not.
Because it's a screening, the useful output is "deficiency present or not" and a rough type and degree. That information does not belong to one brand. Any well-built color-vision screening gives this kind of answer.
Is the EnChroma test free? Do you have to buy glasses?
The online test is free to take, and taking it does not commit you to buying anything. A lens recommendation at the end is marketing, not a result you have to act on. If all you want is to know your status and type, a free screening that is not attached to a store — like the one here — gives you the answer without the upsell.
How accurate is an online color blind test?
An online screening is reliable for the main question — is a moderate-to-strong deficiency present — and it is a sensible first check. Treat the type (protan vs deutan) and degree as estimates. Two things limit any web test: screens are not color-calibrated, so exact shades drift from device to device, and mild red-green cases are genuinely easy to misclassify.
For a confirmed type and degree, an eye-care professional uses calibrated tools — arrangement tests like the Farnsworth D-15 and, in clinics, an anomaloscope. A good online result tells you whether that visit is worth booking.
Take a free color blind test now
Our screening combines Ishihara-style plates with a cone-contrast check, then estimates your type and degree in about two minutes. No account, no email, and nothing stored. If you've taken a branded test before and want a second read — or you just want the answer without a sales page — this gives you a free screening here.
Free color blind test — frequently asked questions
- Is there a free EnChroma test?
- The online EnChroma color-blindness screening is free to take. You can also take an independent free screening, like the one on this page, that estimates your type and degree without asking for an email or purchase.
- What does the EnChroma test actually check?
- It's a color-vision screening — colored-dot plates that check whether you have a red-green deficiency and roughly how strong it is. The method is the same general idea as a standard pseudo-isochromatic plate test such as Ishihara.
- Do I have to buy glasses after taking the test?
- No. The test result and any lens suggestion are separate. Knowing you have a red-green deficiency does not obligate you to buy anything, and glasses help some people but are not a cure.
- Is the free test as good as the branded one?
- For screening — whether a deficiency is present — a well-built free test gives the same kind of answer. Ours also estimates type (protan, deutan, or tritan) and degree. Any on-screen test, branded or not, is a screening and not a clinical diagnosis.
- Which test should I take to find out my type?
- Start with the free color blind test for a type-and-degree estimate, or the Ishihara test for a quick red-green plate check. To confirm the exact type, an eye-care professional uses an arrangement test like the Farnsworth D-15.
Sources
- National Eye Institute (NEI) — Color Blindness Tests
- American Academy of Ophthalmology — What Is Color Blindness?
- NHS — Colour vision deficiency (colour blindness)
EnChroma® is a registered trademark of EnChroma, Inc. Color Vision Labs is independent and is not affiliated with, endorsed by, or sponsored by EnChroma. The name is used here only to describe and compare publicly available color-vision tests.
Last reviewed August 9, 2026. Informational only and regularly reviewed — not a substitute for advice from an eye-care professional.