Set the screen to medium-high brightness and turn off night mode and color filters. Type the number you see on each plate; if you see none, press "I can't see it". This is a screening test, not a medical diagnosis.
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How to use and interpret Color Blind Test (Ishihara-style)
Take a quick online color blind test with Ishihara-style plates. You read a number hidden in a pattern of colored dots; difficulty with several plates can be a sign of red-green color vision deficiency. It is a screening, not a diagnosis, and results depend on your screen.
How to run the test
- Set your screen to medium-high brightness and turn off night mode and color filters.
- Press "Start test" and type the number you see on each plate.
- If you see no number, press "I can't see it".
- Read the summary at the end and repeat once if the result is unclear.
What this test checks
Screens red-green color discrimination with Ishihara-style plates; not a medical diagnosis.
Quickly screen your red-green color vision with Ishihara-style plates. Not a diagnosis.
How to interpret the result
Use the visual or timing result as an initial screen check. Repeat the test fullscreen and at the display’s normal resolution for the most useful comparison.
Browser limitations
Browser tests cannot automatically prove a physical panel defect. Dead pixels, uniformity and backlight issues still require visual confirmation on the actual display.
What you see in the test
Each plate hides a number inside colored dots. People with normal color vision read it easily, while people with red-green difficulty may not see it or read a different number. The test summarizes your result from your answers across the plates.
For a reliable result
Set the screen to medium-high brightness, turn off night mode and color filters, and have enough light in the room. Look at each plate for a few seconds and type your answer; press I can't see it if no number appears.
Troubleshooting by symptom
- My screen shows colors differentlyA color profile or night-light setting can change the result. Turn off filters and, if possible, try another screen.
- I could not see any numbersThis alone is not a diagnosis. Check your display settings and try again; if the result is the same, talk to an eye doctor or optician.
- I see some plates but not othersThat can happen with mild color discrimination difficulty. Standard clinical tests from an eye doctor are needed for a definite answer.
- Can I use it with my child?Children who can read numbers can take it, but treat the result as a pre-screen, not a diagnosis.
Frequently asked questions
Is this color blind test accurate?
It is a quick screening. Plates on a screen depend on brightness, color calibration and night-mode settings, so it cannot replace a test by an eye-care professional.
What does a control plate do?
The first plate is meant to be readable by everyone. If you cannot read it, the result is marked unreliable and you should check your screen settings and repeat.
Can it tell me which type of color blindness I have?
No. This version only screens for red-green discrimination difficulty and does not classify the type or severity.
I failed several plates. What should I do?
Repeat the test with night mode off, then consider a standard test (Ishihara book or anomaloscope) from an optometrist or eye doctor, especially if color matters for your work.
How common is color blindness?
Red-green color vision deficiency affects about 8% of men and about 0.5% of women. It is mild in most people.
Which type of color blindness does this test screen?
It focuses on red-green discrimination. Blue-yellow problems need a separate professional assessment.
Is color blindness treatable?
Inherited color blindness has no known cure, though some glasses and software can make distinctions easier.
Can I use the result for work or a driving license?
No, official assessments are done by authorized health providers. This test is for information only.
What does Color Blind Test (Ishihara-style) check?
Screens red-green color discrimination with Ishihara-style plates; not a medical diagnosis.
Can a browser confirm a dead pixel or panel fault?
It can display controlled test patterns, but the final confirmation is visual because the browser cannot inspect the physical panel itself.
What should I do if the result looks bad?
Repeat the test under the same conditions, check the suggested next diagnostic and compare with another browser, connection or device where practical. Use the related guides for step-by-step troubleshooting.