Color Blind Test

About the Color Blind Test

Colour blindness, more accurately called colour vision deficiency, means some colours look less different from each other than they do to most people. It is commonly reported to affect around 8% of men and about 0.5% of women of Northern European descent, and most often involves confusing reds with greens.

This test shows 14 plates made of many coloured dots. In each plate a number is hidden in the pattern. People with typical colour vision can read it. People with some kinds of colour vision deficiency see a different number or none at all. Type the number you see, or press the button if you see none.

Please treat this as a screening game and not a diagnosis. Our plates are generated by the page, they have not been clinically validated, and your screen brightness, colour settings and lighting all change how colours look. Only an eye care professional can test your colour vision properly.

How the test works

• Before you start, turn off any night mode, blue-light filter or colour profile, set the screen to normal brightness and sit in good, steady light.
• The first plate is a clear one that almost everyone can read. It also checks that your screen is showing colours properly.
• Next come red-green plates and a few blue-yellow plates, in a mixed order that is different on every run.
• Type the number you see in the dots. If you cannot see any number, press the "I can't see a number" button. There is no time limit.
• At the end you see how many plates you got right and how many red-green and blue-yellow plates you missed.

Levels

Your score maps to one of 5 levels. These ranges are guides, not official standards.

Tips to improve

• Turn off any night shift, dark mode filter or blue-light setting first. They change the colours on screen.
• Look at the whole circle rather than hunting for the number. Many people see it better by relaxing their eyes.
• Wear your usual glasses or contact lenses.
• Do not squint or tilt your head. Answer with your first impression.
• If you got several plates wrong, repeat the test on another screen and then see an optician or eye doctor for a proper exam.

Frequently asked questions

Is this a real colour blindness test?

It is a screening game. The plates follow the same general idea as classic colour-vision plates, but they are generated by this page, they are not clinically validated, and a screen cannot replace a proper examination. A result here is a hint, not a diagnosis.

What do the red-green and blue-yellow plates check?

Red-green plates check the most common types of colour vision difficulty, protan and deutan. Blue-yellow plates check the rarer tritan type. We show how many of each kind you missed, but this test cannot tell you the exact type or how severe it is.

Can my screen affect the result?

Yes, a lot. Brightness, contrast, night mode, colour profiles, reflections and even the angle you look at the screen change the colours you see. If you missed plates, try again with filters off and the screen at normal settings.

What does it mean if I missed several plates?

It may mean you have some difficulty telling certain colours apart, or that your screen settings are interfering. Repeat the test with default settings. If you still miss plates, ask an optician or eye doctor for a full colour-vision test.

Can colour blindness be cured?

Inherited colour vision deficiency is lifelong and there is no cure at present. Special tinted lenses and phone or computer colour filters can help some people tell colours apart, and most people adapt well. An eye care professional can advise you.

Why do the plates change each time?

Every run generates new dot patterns, positions and numbers, so you cannot memorise the answers. The pattern for each plate is created fresh by the page and nothing is sent to a server.