Color Blind Testfree online colorblind test with red, green & blue cone scores
Color blind test
Ready when you are
Each plate hides one digit in colored dots. Plates get subtler as you answer correctly — separately for your red, green, and blue cones.
- Screen brightness at 100%, night mode off
- Remove tinted lenses (or wear EnChroma-style glasses to compare)
- 19 plates · 10 seconds each · about 2 minutes
A screening tool, not a medical diagnosis · results stay on this device
What is a color blind test
A two-minute check on how your cones see color
A color blind test shows patterns that are easy to read with typical color vision and hard to read with a color vision deficiency. Around 1 in 12 men and 1 in 200 women have some form of color blindness, and many never find out. This free colorblind test uses Ishihara-style dot plates whose colors are tuned to one cone type at a time, then tells you which cone — if any — is weaker than typical, and by how much.
- Scores all three cones
- Separate 0–100 scores for your red (L), green (M), and blue (S) cones — so the test screens for blue-yellow deficiency too, which classic Ishihara plates cannot.
- Adaptive, not fixed
- Each cone axis runs its own staircase. Plates get subtler while you read them and stronger when you miss, so two minutes are spent near your personal threshold.
- Fresh plates every run
- Dot layout, digit, and base color are generated in your browser for every plate. Nothing to memorize, so a retake is a real re-measurement.
- Private by design
- No sign-up and no upload. Your last 12 results stay in this browser, ready to compare devices, lighting, or color correcting glasses.
How it works
How to take the color blind test
Nineteen plates, one digit each, ten seconds per plate. Read what you can, say when you can't, and the test finds the faintest color difference each of your cones can still pick out.
- 1
Set up your screen
Turn brightness to 100% and switch off night mode, blue-light filters, and True Tone. Sit about an arm’s length from the screen in normal room light, and take off sunglasses or any tinted lenses — unless you are deliberately testing with color correcting glasses.
- 2
Read the warm-up plate
The first plate hides an orange digit that stands out by brightness as well as color, so everyone should be able to read it. It checks that your screen and attention are working before the real measurement starts.
- 3
Answer 18 adaptive plates
Each plate is a circle of colored dots with one digit from 0 to 9 hidden inside. Tap or type the digit, or choose “Can’t see” if nothing stands out. You have 10 seconds per plate. Every right answer makes the next plate on that cone axis subtler; a miss makes it stronger.
- 4
Read your cone scores
At the end you get a 0–100 score for your red (L), green (M), and blue (S) cones and a screening verdict — normal, protan, deutan, red-green, or tritan — with mild, moderate, or strong severity. Results save on your device so you can compare later runs.
Reading your cone scores
- 80–100
- Typical. You read the subtle plates on this cone axis. People with normal color vision usually land here on all three scores.
- 60–79
- Mild. You needed a little more color contrast than typical. On a red or green axis this is the pattern of mild protanomaly or deuteranomaly; retest on another screen to confirm.
- 35–59
- Moderate. Clearly reduced sensitivity for this cone type. Many everyday color pairs — red and brown, green and orange, blue and purple — will be harder to tell apart.
- 0–34
- Strong. Even the strongest plates on this axis were hard to read. This matches dichromacy (protanopia, deuteranopia, or tritanopia) or a strong anomalous trichromacy.
For an accurate result
- Set screen brightness to maximum and turn off night shift, True Tone, and blue-light filters before you start.
- Take the test in normal indoor light — avoid direct sun on the screen and very dark rooms.
- Look at the whole plate for a second rather than hunting dot by dot; the digit appears as a shape, not a pattern.
- Answer “Can’t see” honestly. Guessing adds noise but cannot raise a score for long, because the staircase checks again.
- Retake on a second device. A result that repeats on two screens is far more trustworthy than one run.
- Testing color correcting glasses? Do one run without them and one with them, then compare in History.
FAQ
Color blind test, answered
Straight answers about this free online color blind test, your cone scores, and what to do next.
How does this color blind test work?
You see 19 circles of colored dots, each hiding a digit from 0 to 9. After a warm-up plate, each plate tests one cone type: the digit and background differ only in what your red (L), green (M), or blue (S) cones detect. Read the digit and the next plate on that axis gets subtler; miss it and it gets stronger. Where each axis settles becomes your 0–100 cone score.
Is the colorblind test free?
Yes. The full test, the cone scores, and the saved history are free, with no sign-up, download, or email gate. The site is supported only by anonymous analytics.
What do my red, green, and blue scores mean?
Each score shows how subtle a color difference you could still read for one cone type. 80–100 is typical, 60–79 suggests a mild deficiency, 35–59 moderate, and below 35 strong. A low red score points to a protan deficiency, a low green score to deutan, and a low blue score to tritan.
How accurate is an online color blind test?
Good enough to screen, not to diagnose. Plate tests like Ishihara catch the large majority of red-green deficiencies, but phone and laptop screens are not color calibrated, so scores can shift by around ten points between devices. If you score below 80 on any axis, retest on another screen and then see an optometrist for an anomaloscope or Farnsworth test.
How is this different from the EnChroma color blind test or Ishihara plates?
Classic Ishihara plates (1917) are fixed images designed for printed paper and only screen for red-green deficiency. The EnChroma test scores each cone with cone-isolating colors. This test combines the two ideas: Ishihara-style dot plates generated fresh every run, cone-isolating colors for all three cone types including blue, and an adaptive staircase so the test spends its time near your personal threshold.
Can I take the test while wearing color blind glasses?
Yes, and comparing runs is one of the best uses of the History panel. Take one test without glasses, then one with them, under the same light and on the same screen. Glasses such as EnChroma can raise scores for some people with anomalous trichromacy; they do not restore a missing cone.