Color blind test.
Find out whether you might have red-green or blue-yellow color blindness, which type, and how strong it is. Every plate is generated fresh.
What number do you see?
Each plate hides a number made of colored dots. Type the number you see, or tap “I can’t see a number”.
For accurate results
- Turn screen brightness up and switch off Night Shift, True Tone, Night Light, blue-light filters and any color-adjusting apps or extensions.
- Use a phone, tablet or monitor in normal indoor light, not in direct sunlight.
- Wear your usual glasses or contacts, but not tinted or color-correcting lenses.
- Don’t zoom in or stare. Answer with your first impression within a few seconds.
Calculating your result…
Keyboard: 0–9 type the number · Enter next · Backspace delete · N or Esc can’t see a number
How common is red-green color blindness?
It’s inherited and far more common in men.Rates vary by population and are lower in many parts of the world. Source: J. Birch, “Worldwide prevalence of red-green color deficiency,” J Opt Soc Am A, 2012.
Pick a test.
Start with the full screening. Go deeper on one type if your result points there. Drag the handle on the photo to compare.
Color blind test
Red-green and blue-yellow plates, plus two-digit plates that tell protan and deutan types apart. Start here.
- Red
- Green
- Blue-yellow
- Severity
Red-green test
More red-green plates at several strengths, separately for the red-sensitive and green-sensitive cones.
- Red
- Green
Tritanopia test
Plates built around the blue-sensitive cones. Blue-yellow deficiencies are rare when inherited.
Start the tritanopia testTest for kids
Each picture hides a shape made of colored dots. Children tap the shape they see, or “Nothing”.
- Shapes
- Red-green
Reverse test
Hidden-figure plates that can be easier to read with a red-green deficiency than with typical color vision.
- Hidden figures
Play with color.
Quick games built on the same color science as the tests. Fun to compare with a friend, but not a screening. All games
Three steps. Three minutes.
Look at each plate
A circle of dots hides a number. Its colors look different to typical eyes and the same to eyes missing a cone type.
Type what you see
Enter the number, or tap “I can’t see a number”. Go with your first impression within a few seconds.
Get your likely type
Control, red-green, blue-yellow and two-digit plates combine into a likely type and a severity from mild to strong.
Note: this is a screening, not a diagnosis. Your screen’s settings affect what you see, so confirm any result with an eye care professional. How the test works
What the test screens for.
Right half of each photo simulated with the Machado et al. (2009) model used by our simulator; results depend on your screen. The test doesn’t screen for complete color blindness (achromatopsia).
Questions.
How accurate is an online color blind test?
Online plate tests are good at spotting red-green color vision deficiency, and our scoring also estimates the type and severity. Accuracy depends on your screen: brightness, color settings such as Night Shift or blue-light filters, and display quality all affect what you see. Treat the result as screening and confirm it with an eye care professional.
Is this the Ishihara test?
No. The Ishihara test is a printed book of plates. Our plates use the same idea (a figure hidden in colored dots) but are generated by our own software from color science models, so every test is different and no copyrighted plates are reproduced.
What types of color blindness can this test detect?
The test screens for red-green deficiencies (protan and deutan types, including protanomaly, protanopia, deuteranomaly and deuteranopia) and for blue-yellow deficiencies (tritan types). It does not test for complete color blindness (achromatopsia).
How common is color blindness?
Around 1 in 12 men and 1 in 200 women of Northern European ancestry have a red-green color vision deficiency. Rates are lower in many other populations. The most common type is deuteranomaly. Blue-yellow deficiencies are rare when inherited.
Can color blindness be cured?
Inherited color blindness can’t currently be cured. Color-enhancing glasses can increase red-green contrast for some people with mild to moderate deficiency, and apps, settings and labels help with everyday tasks. If your color vision has changed recently, see an eye doctor, as it can be a sign of an eye condition.
How do I know if I’m color blind?
Common signs are mixing up reds, greens, browns and oranges, finding some colors hard to name, or seeing less contrast than others in color-coded charts and maps. Many people with a mild deficiency never notice it. A plate test like this one is the quickest way to find out, and an eye care professional can confirm the result.
What causes color blindness?
Most color blindness is inherited: a change in a gene for one of the three cone pigments, usually on the X chromosome. It can also be acquired later through eye disease, diabetes, some medications or aging of the lens; acquired changes are often blue-yellow. A recent change in your color vision should be checked by an eye doctor.
Can color blind people drive?
In most countries people with color blindness can hold an ordinary driving license. Traffic lights are always in the same order and position, which helps. Some professional licenses and jobs, such as pilots, train drivers and some electrical work, have color vision requirements that vary by country and employer, so check the rules that apply to you.
How is color blindness confirmed?
An optometrist or ophthalmologist can confirm color blindness with clinical tests, such as printed plate tests (for example Ishihara or HRR), arrangement tests like the Farnsworth D-15, or an anomaloscope, which can measure the type and severity precisely.
Can my child take this test?
Yes. Our color blind test for kids uses shapes instead of numbers so children who can’t read digits yet can take it.