More Color Vision Tests

Red-green screening with pseudo-isochromatic plates (hidden numbers/shapes).

Reliable for screening online. Our version uses freshly generated plates so answers can't be memorized.

Arrange color caps in order to reveal protan / deutan / tritan confusion axes.

Classifies the type and separates moderate+ deficiencies; scored with the Vingrys & King-Smith method. Type is an estimate on an uncalibrated screen.

Symbol plates that both screen and classify, including blue-yellow (tritan).

Language-free; screens red-green AND blue-yellow and grades the degree. Blue-yellow is least reliable on an uncalibrated screen.

Fine color-discrimination score from arranging 85 hue caps across 4 boxes.

Long and very sensitive to screen calibration, so scores are relative — but our version gives a Total Error Score and the classic polar plot.

The adaptive cone test in hard mode: contrast drops to your threshold on each cone, 3 seconds per plate, no second look.

Same scoring as the standard test — stricter about hesitation, not more precise about your cones. Good for stress-testing a borderline result.

Blue-yellow screening on the S-cone (tritan) axis, which Ishihara plates don't test at all.

Screens the axis plate tests miss. Least reliable of the three on an uncalibrated screen — displays render short-wavelength blues worst — so the blue plates are kept deliberately easier to avoid false positives.

Whether someone has a fourth cone class — the ability to distinguish lights that match for ordinary color vision.

Impossible on a screen, not merely unreliable: separating a tetrachromat needs two lights that are identical to a trichromat but differ at the fourth cone, and a three-primary display cannot produce that pair. The quizzes claiming to do it measure your monitor. We explain what can and cannot be established.

Signal-light recognition — pairs of colored lights at a distance, the way a pilot or mariner reads them in practice.

Cannot be reproduced on a screen: it depends on calibrated light sources at a fixed distance and small angular size. We explain how it works, who still uses it, and what a pass requires.

Cone-isolated contrast thresholds — how faint a color each of your L, M and S cones can still use to read a letter. Scored out of 100 per cone, per eye.

Cannot be reproduced on a screen: the letters must be invisible to two cone classes and matched in luminance to the background, which needs a calibrated display. The FAA also prohibits downloaded and printed color vision tests outright. We explain the scoring and the USAF vs FAA cut-offs.

Software plate test that screens red-green, then quantifies protan and deutan degree separately, plus a tritan sub-test. One of three computer tests the FAA accepts.

Sold as software rather than offered as a web test — and a self-administered run does not count for certification, which the FAA requires to be done in person. We cover the section scores and the independent accuracy data.

Optical color-matching instrument — the clinical gold standard for red-green type and degree. Match a red-green mixture to a yellow.

We offer an interactive demonstration of the Rayleigh match. It can't classify your vision — a screen's yellow is itself red+green, so both halves become identical light and no observer is separated — but it shows how the instrument works and why online ≠ clinical. Red-green only, not tritan.

Not a test — shows how an image looks with protan, deutan, or tritan vision, at any severity from mild to complete.

Available now. Upload your own image (processed locally, never uploaded) or use a built-in scene, then export the result with its severity labelled.

Child-friendly screening with pictures, shapes, or symbols instead of numbers — CVTME, the unlettered Ishihara, and HRR, chosen by age.

Reliable for red-green screening online; pick the test by your child's age. A self-check, not a diagnosis.