Colour Blindness Test
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Professional Color Vision Test
Test your color perception (Protanopia, Deuteranopia, Tritanopia) using the Cambridge triplet method.
How does the test work?
The test is based on the Cambridge triplet method. You will see three circles. Two of them have the same shade and one is slightly different.
- 🎯 Task: Identify the circle that is different in color from the others.
- ⚡ Time: We measure your reaction time. Longer hesitation affects the result.
- 🧠 Adaptation: The test automatically adjusts the difficulty based on your answers.
Example: The center circle is different.
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Webp.PL online colorblindness test
A quick and understandable color recognition test that helps detect possible color vision disorders. The tool uses sets of wheels with a controlled color difference and a simple A, B, C answer system. First, you will perform a short screen calibration and a training question, then you will move on to a series of test questions. At the end you will see a summary indicating the perception profile: normal, protan, deutan, tritan or mixed. You can save, print or export the result to CSV or JSON.
Start test Step-by-step instructions
What is this test and what can you learn from it
This tool performs a short, indicative test of the ability to distinguish colors. In the practical world, such a skill affects everyday situations. The color of traffic lights, warning icons in applications, indicators on charts, color selection in projects or verification of the quality of product photos. Difficulties with color recognition often remain invisible because the brain compensates for the lack of information, but in certain scenarios color differences can be crucial. Our test does not assess visual acuity or detect eye diseases. It does not replace an ophthalmological consultation. However, it provides information whether it is worth performing further diagnostics, especially if the result indicates one of the color disorder profiles.
How the test logic works in the Webp.PL tool
Rule of questions
- In each question you see three circles arranged horizontally.
- The two circles are similar in color. One thing is different.
- You choose the letter corresponding to the circle you perceive as different.
- If you don't see the difference, you can lower the difficulty or use a hint.
Difficulty and progression
- The color difference decreases in subsequent questions.
- The response profile maps to the following categories: protan, deutan, tritan.
- The system evaluates the convergence of choices and the stability of diagnoses.
- At the end you get a profile label and a description of the interpretation.
Step-by-step instructions
- Sit approximately 50 to 70 cm from the screen. If you can, set your monitor brightness to 80 to 100 percent.
- Wear corrective glasses if prescribed. The test assumes standard user conditions.
- Perform a short calibration. Make sure you can see each step on the brightness and contrast scale.
- Solve the practice question. It allows you to understand the mechanics of A, B, C without affecting your grade.
- Go to the actual test. In each step, point to a circle that is different in color from the other two.
- Finally, click Show Result. You will see the perception profile with an explanation and export options.
Key concepts and types of color disorders
Color perception is the ability to distinguish the components of light and interpret the differences between hues and saturation. Common color vision disorders are described as protan, deutan and tritan. These are categories that refer to the wavelength ranges corresponding to the red, green and blue-yellow relationships respectively. In practice, this translates into real difficulties in reading differences that are obvious to others. See what each category means.
Protan
Concerns the perception of red. The user may perceive red shades as darker or closer to brown. In practice, red markers are confused with gray or other, less saturated colors. In online tests, it is manifested by lower choice certainty in combinations with red and green.
Deutan
Related to the reception of greenery. For people with deutan, greens are sometimes confused with browns, reds or grays, depending on the lighting and saturation. In our test, decisions in green-red and green-gray pairs give a signal that color differences are not visible enough.
Tritan
A rarer case, usually associated with the distinction between blue and blue-yellow relationships. In everyday use, it refers to patterns where the blue accent is combined with green or yellow. In the test, it appears as uncertainty in tasks with predominance of cold colors.
Mixed profile
Indicates inconsistent responses or simultaneous difficulty in several areas. The mixed result is a signal. If you experience problems in practical professional tasks, it is worth consulting a specialist.
Why an online test makes sense for everyday use
Not everyone needs a full, clinical diagnosis. In many scenarios, a quick tool is enough to tell you whether color differences are causing a problem. The graphic designer will check whether the pallet sets are legible to a larger group of recipients. The teacher will assess whether the teaching materials do not make reading difficult. The parent will see whether the child responds to color-based commands. The Webp.PL test is simple and available from a browser. It can be done in a few minutes, without creating an account and without installation.
Screen calibration and the influence of external conditions
Lighting conditions and monitor settings are of great importance. Too low brightness suppresses color differences. Too high a contrast redraws the image and may introduce artifacts. Therefore, our calibration module will ask you to adjust the brightness and contrast so that each degree of the scale is visible. If you use night mode or blue light filters, the test may be more difficult. If possible, turn off filters during the test. On mobile devices, remember that automatic brightness reacts to the surroundings. Stable artificial light in the room is better than harsh sunlight falling on the screen.
Training mode and tips
Before starting the actual test, you will receive a practice question. It is only used to familiarize yourself with the interface. The letters A, B, C correspond to circles from left to right. If you are not sure, use the hint. The tool will point out the slight difference so you can see the principle. In orientation tests, correct understanding of the task is more important than forcing a response. After training, this section does not affect the result.
How to interpret the result
The result is presented in the form of a short label and explanation. If you see a normal profile, the test showed no significant color discrimination difficulties under the conditions used in the tool. If you receive protan, deutan or tritan, it is a signal that discrimination may have been difficult for certain color ranges. A mixed profile occurs when the response behavior does not provide a clear match. Please remember that the test is not a medical diagnosis. If the result worries you or color differences are important in your work, consult an ophthalmologist. A specialist can perform clinical tests and select appropriate procedures.
Example scenario for passing the
test 1. Open the test in the browser and go to the calibration module.
2. Adjust the brightness so that you can see each step of the scale without the fields merging.
3. Do a practice question and make sure you understand the A, B, C pattern.
4. Solve 12 questions with decreasing color difference one by one.
5. Click Show result and read the profile interpretation.
6. Save the result to CSV or JSON if you want to keep history.The most common mistakes and how to avoid them
- Test in bright sunlight on the phone screen. Solution: switch to stable lighting in the room.
- Blue light filters enabled. Solution: Temporarily disable filters and night mode.
- No vision correction for people wearing glasses. Solution: use the glasses you use for computer work.
- Guessing without reflection. Solution: Use a hint or lower the difficulty to make the assessment more meaningful.
Why is it worth doing the test in the Webp.PL version
- Quick start without registration and without unnecessary steps.
- Clear interface with a clear A, B, C layout and hints.
- Screen calibration and practice question before the actual part.
- Result with profile interpretation and summary in simple words.
- Export results to CSV or JSON and print in one click.
- No ads or unnecessary distractions. What counts is content and precision.
Security and privacy
The tool operates in a model that does not require creating an account. We generate the displayed colors locally in the browser. You can keep the results on your side by exporting to a file. If you want to print them, use the built-in print button. We do not automatically send data to external analytical systems. Your replies don't have to leave your device unless you choose otherwise via export or printing.
Most common uses of the
Test School and education
Teachers can quickly check that color-based teaching materials are readable by all students. The test is useful when planning posters, maps and worksheets, where green and red markings are sometimes confused.
Design and Marketing
Graphic designers and interface developers use the test to quickly inspect pallets. Thanks to this, the risk of important messages getting lost in difficult to read color combinations can be reduced. This is a small step that improves the accessibility of projects.
Online shopping and photography
When selecting products in different color variants, the test helps to ensure that you read the colors as intended by the manufacturer. In product photography, it's a quick check to see if color correction hasn't gone too far.
Everyday convenience
Seemingly trivial color differences can change the comfort of using applications, websites or control panels. The test can show that it is better to choose an alternative motif or correct the contrast.
Limitations and Important Notes
This is an orientation test. The result depends on equipment, lighting, system settings and subjective perception. It does not diagnose eye diseases and does not replace a visit to a specialist. If the result indicates difficulties, take it as a signal. In practice, people with color disorders cope well with many tasks. Workbenches offer alternatives such as additional markings, icons, patterns or text captions. It is important to match the tools to the situation, and not the other way around.
Formulas and calculation principles behind the test
Difficulty scale and stimulus selection
1. Each question uses a pair of colors with a specific difference.
2. The difference decreases with each step in a given set.
3. Sets of pairs form a map for protan, deutan, tritan.
4. The stability of choices is assessed by dispersion and repeatability.Profile interpretation
normal → no persistent difficulties in selected sets
protan → difficulty in red-green combinations with a predominance of red
deutan → difficulty in green-red and green-gray sets
tritan → difficulty in blue-green and blue-yellow relationships
mixed → inconsistent or borderline answersHow to prepare for the test
- Choose stable lighting. Avoid reflections on the screen.
- Disable color temperature modes and blue light filters.
- Set the brightness in the upper range, but without burnout.
- Wear prescription glasses if you wear them at the computer.
- Take a few minutes without rushing. The test usually takes three to five minutes.
Frequently asked questions
Is the test compatible with the Ishihara tables
Our test does not copy the Ishihara tables. It uses its own sets of color stimuli with controlled color differences. Thanks to this, it works smoothly on the screen and does not require ready-made arrays in images.
Can I test myself on my phone
Yes. However, remember about the influence of brightness and reflections. If possible, use a room with even lighting. The result on the phone screen may be sensitive to automatic brightness adjustment.
What to do if the result was mixed
This means that the answers were inconsistent or close to the threshold of discrimination. You can repeat the test after recalibration. If the problem persists and is significant at work, talk to a specialist.
Is the result saved on the server
No, unless you choose to export or print. By default, the result remains on the browser's side.
How many questions does the test contain
The default configuration is a series of about a dozen questions. If necessary, the tool can add a few steps with a very small color difference to confirm the stability of the selections.
Examples of using the result in practice
Individual user
You want to check whether the color sets in applications are legible to you. You take the test and receive a deutan profile. In everyday use, you choose themes with higher contrast and text labels next to icons.
Interface Designer
You are testing a prototype panel in which red and green indicators play a key role. You introduce additional icons and mark critical elements with a pattern and signature. Thanks to this, the panel is understandable to people with different perception profiles.
Benefit Summary
- Quick orientation check, no installation required.
- Simple interface, training mode, calibration and tips.
- Result with clear interpretation and export option.
- Sensible default settings and no unnecessary distractions.
- Accessibility support for everyday projects and materials.
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