Free online screening
Free Color Blind Test With Instant Results
Use this free color blind test to screen for common color vision differences online. The test uses Ishihara-style plates for red-green color blindness and blue-yellow plates for tritan-type deficiency, then gives a plain-language result summary.
Quick Answer
A free online color blind test can help you check whether your color vision looks normal, red-green deficient, blue-yellow deficient, or inconclusive. It is a screening tool, not a medical diagnosis, and it works best with normal screen brightness and good lighting.
At a Glance
- No email or signup required
- Takes about 3 to 4 minutes
- Screens red-green and blue-yellow color vision
- Gives instant educational results
How to take the test
- 1Set your screen brightness to a normal comfortable level.
- 2Use the test in steady indoor light rather than direct sunlight or a dark room.
- 3Look at each plate from a normal viewing distance.
- 4Enter the number you see, even if you are not completely sure.
- 5Use the result as a screening signal and follow up with an eye care professional if needed.
Take the Free Color Blind Test
Answer each plate with the number you see, or choose that you do not see anything. Your result appears immediately after the final plate.
Plate 1 of 20
What number do you see in the circle above?
Test Instructions
- Look at each colored circle
- Enter the number you see (if any)
- Take your time — there's no rush
- Make sure your screen brightness is normal
- Ensure good lighting conditions
Medical Disclaimer: This online test is a screening tool. While it can help identify potential color vision deficiencies, it is not a substitute for professional medical diagnosis. Screen brightness, lighting conditions, and display calibration can affect results.
How to Interpret Results
Online color vision results are most useful when you look at the pattern, not just a single answer.
Likely normal color vision
Most plates were answered like someone with typical color discrimination.
Possible color vision deficiency
Several answers matched common red-green or blue-yellow deficiency patterns.
Inconclusive result
The answer pattern was mixed. Retake the test in better lighting or ask an eye care professional.
What this free test screens for
The first set of plates checks the red-green confusion axis used to screen for protanopia, protanomaly, deuteranopia, and deuteranomaly. The second set checks the blue-yellow axis used for tritanopia and tritanomaly. Most inherited color blindness is red-green, but a complete online screening should include both axes.
Why results can vary online
Online tests depend on your display, color profile, screen brightness, room lighting, and viewing distance. A calibrated clinical test is more controlled. This page is useful for a first check, retesting, or learning what your answers may suggest, but it should not replace a professional exam.
Frequently Asked Questions
Is this color blind test really free?
Yes. The test is free to use and does not require an email address, account, or payment.
Can this test diagnose color blindness?
No. It is an educational screening tool. A professional diagnosis requires a standardized color vision test administered by an eye care professional.
Is this the same as a colour blind test?
Yes. Color blind test and colour blind test refer to the same type of screening; the spelling differs by region.