You look at a circle filled with colored dots. A number or shape should be hidden inside it, but you either see it immediately, see something different, or cannot make it out at all.
That simple experience is the basis of color-plate testing, one of the most widely recognized ways to screen color vision. An online color blindness test brings a similar process to your computer or phone, allowing you to check your color perception in a few minutes.
However, an online test is only a screening tool. Your screen, brightness, room lighting, viewing angle, and display settings can all influence what you see. It cannot diagnose color vision deficiency or replace an examination by an eye-care professional.
You can begin with the Solvioza Color Blindness Test, which presents 15 colored-dot plates and separately summarizes red-green and blue-yellow screening results.
What Does Color Blindness Mean?
The term “color blindness” can sound as though a person sees no color at all. That is uncommon. Most people with color vision deficiency can see colors but have difficulty distinguishing particular combinations.
For example, two colors that look clearly different to one person may appear very similar to someone with a color vision deficiency. The difference may become more noticeable when colors are muted, dark, close together, or displayed against a similar background.
Color vision differences are generally grouped by the part of color perception they affect:
- Red-green color vision deficiency: Difficulty separating some reds, greens, browns, and related colors.
- Blue-yellow color vision deficiency: Difficulty distinguishing certain blues, greens, yellows, and related colors.
- Complete color vision deficiency: A much rarer condition involving severely reduced or absent color perception.
According to the National Eye Institute’s overview of color vision deficiency types, red-green deficiencies are the most common, while blue-yellow deficiencies occur less frequently.
How Color-Plate Testing Works
A color plate is usually made from many dots of different colors and sizes. Some of those dots form a number, line, or shape, while the remaining dots create the background.
The foreground and background colors are intentionally chosen to test a particular area of color perception. Someone who distinguishes those colors easily may recognize the hidden figure. Someone who experiences difficulty with that color group may see a different figure, only part of it, or nothing recognizable.
The National Eye Institute explains that color-plate testing is the most common type of color vision deficiency test. Different plates may be used to investigate different kinds of color vision difficulty.
Online versions follow the same general visual idea, but they have an important limitation: the colors are displayed digitally. Two screens may reproduce the same color differently.
What the Solvioza Color Blindness Test Includes
The Solvioza test is a short, color-plate-style screening designed to take about two minutes. It contains 15 plates with numbers and recognizable shapes.
The plates are divided into three groups:
- One control plate
- Nine red-green screening plates
- Five blue-yellow screening plates
Some plates contain a single-digit or multi-digit number. Others contain a shape such as a circle, triangle, square, star, diamond, or heart. This variety prevents the entire screening from depending on number recognition alone.
The test also includes easier and more challenging plates. A progress indicator shows how far you have gone, and you can return to the previous plate when necessary.
If you cannot confidently identify what is shown, select Not sure. An honest uncertain response is more useful than repeatedly guessing.
Why the Test Includes a Control Plate
The control plate is expected to be easier to recognize and is not intended to measure one specific color deficiency group.
It helps check whether the test conditions were suitable and whether the instructions were understood. If the control plate is not identified, the final result may be marked as inconclusive.
That does not automatically mean you have a color vision deficiency. It could happen because of low screen brightness, a display filter, glare, an unusual viewing angle, confusion about the task, or another visual issue.
In that situation, check your setup and retake the screening. If the control plate remains difficult to identify, consider discussing it with an eye-care professional.
Red-Green Color Vision Deficiency
Red-green color vision deficiency is the most common group. It includes several types of color perception differences associated with red-sensitive or green-sensitive vision.
A person with a red-green deficiency does not necessarily confuse every red object with every green object. Real-world effects depend on the exact colors, their brightness, surrounding colors, and the strength of the deficiency.
Difficulties may appear when:
- Reading charts that rely only on red and green markers
- Separating muted green from brown
- Recognizing red details against dark backgrounds
- Interpreting status indicators without labels or icons
- Comparing similar colors in maps, games, or dashboards
The Solvioza result reports how many red-green plates you identified. It does not diagnose a specific subtype or measure clinical severity.
Blue-Yellow Color Vision Deficiency
Blue-yellow color vision deficiency is less common. It may make some blue and green shades difficult to separate or cause certain yellow, red, and related colors to appear more alike.
This group is screened separately because it does not follow the same color patterns as a red-green deficiency. Passing red-green plates does not necessarily predict how someone will respond to blue-yellow plates.
The Solvioza test therefore provides an individual blue-yellow score rather than combining every response into one unexplained total.
As with the red-green section, the result is only a screening indication. It cannot confirm a blue-yellow deficiency or identify its cause.
How to Prepare for an Online Color Blindness Test
Online test results depend heavily on what your display actually shows. Take a minute to prepare before starting.
- Use normal room lighting. Avoid a very dark room, direct sunlight, or strong glare across the display.
- Set a comfortable screen brightness. The screen should be clear without appearing unusually dim or painfully bright.
- Disable Night Light or blue-light filters. These features intentionally change the colors shown by your display.
- Turn off grayscale and color filters. Check both your operating system and browser accessibility settings.
- Look directly at the screen. Colors on some displays shift noticeably when viewed from the side.
- Avoid color-enhancing glasses. Do not use tinted lenses or software designed to alter colors during the screening.
- Use your normal vision correction. Wear your usual prescription glasses or contact lenses if you need them to see the plates clearly.
Do not edit your monitor’s color settings halfway through the test. Use one consistent setup from the control plate to the final question.
For a clearer first attempt, a reasonably modern computer, tablet, or phone display is preferable to an old, damaged, heavily tinted, or poorly calibrated screen.
How to Take the Online Color Blindness Test
Once your viewing conditions are ready, the screening process is straightforward.
1. Open the test
Visit the online Color Blindness Test and read the preparation notes shown on the starting screen.
2. Begin the screening
Start the test when your display filters are off and you can view the screen comfortably. You will see one colored-dot plate at a time.
3. Identify the number or shape
Look at the plate and enter the number you can see or choose the matching shape. Use your first genuine observation rather than searching for an outline for a long time.
If no answer is reasonably clear, choose Not sure. The screening is not an exam you need to pass.
4. Continue through all 15 plates
Use the progress indicator to follow your position. You can go back if you accidentally selected the wrong answer, but avoid changing answers simply because you are worried about the result.
5. View your screening summary
After the final plate, select See My Result. The results page shows your overall identified count together with separate red-green, blue-yellow, and control plate summaries.
How to Interpret Your Result
The result describes patterns in your responses. It is not a medical conclusion.
| Result area | What it may suggest | What it does not prove |
|---|---|---|
| Overall score | How many plates you identified across the screening | Normal color vision or a diagnosed deficiency |
| Red-green score | Whether responses show difficulty on the red-green plate group | A specific protan or deutan subtype |
| Blue-yellow score | Whether responses show difficulty on the blue-yellow plate group | A confirmed tritan-type deficiency |
| Control plate | Whether the basic plate and test conditions appeared usable | The cause of an inconclusive result |
No obvious color-vision difficulty detected
This means your responses did not show an obvious difficulty within this screening. It does not guarantee that your color vision is typical in every situation or rule out a mild deficiency.
Possible red-green color-vision difficulty
Your responses included multiple missed plates in the red-green group. Consider retaking the test under suitable display conditions. Seek a professional assessment if the pattern repeats or affects daily activities.
Possible blue-yellow color-vision difficulty
Your responses showed a pattern in the blue-yellow group. Because displays can reproduce blue and yellow tones differently, checking the screen conditions and repeating the test may be useful.
Possible difficulty in both groups
Missed plates appeared in both the red-green and blue-yellow groups. This could reflect color perception, but poor display conditions can also affect several plate groups at once.
Inconclusive result
The control plate was not identified, so the remaining scores should not be interpreted on their own. Review your display settings, lighting, viewing angle, and understanding of the instructions before trying again.
Why This Is Screening, Not Diagnosis
A professionally administered color vision assessment takes place under controlled conditions. An eye-care professional can consider your visual history, examine your eyes, use standardized materials, and select additional tests when the first result is unclear.
An online screening cannot control:
- Your monitor’s color accuracy
- Automatic screen color adjustments
- Ambient lighting and glare
- The age or condition of the display
- How far away or at what angle you view it
- Other vision issues that may make a plate hard to read
The result thresholds used by an online tool are educational guidelines. They are not clinical diagnostic cutoffs and should not be used to make medical, educational, licensing, or employment decisions.
An eye-care professional may use validated color plates and, when needed, other methods such as hue-arrangement testing or an anomaloscope. The American Optometric Association recommends a comprehensive eye examination for diagnosing color vision deficiency and determining its nature and severity.
What Can Affect an Online Test Result?
A single missed plate does not necessarily indicate a deficiency. Digital color testing has several sources of variation.
- Night modes: Warm display modes reduce blue light and change the intended plate colors.
- Low brightness: Darker dots may become harder to separate.
- Excessive brightness: Very bright displays can reduce comfortable visual distinction.
- Viewing angle: Some laptop and phone screens shift color when tilted.
- Ambient light: Colored room lighting or direct sunlight can alter how the screen appears.
- Display quality: Old, damaged, or poorly calibrated screens may reproduce colors inaccurately.
- Color profiles: Custom profiles and accessibility filters may alter specific color ranges.
- Tinted lenses: Sunglasses and color-enhancing glasses change the light reaching your eyes.
This is why the control plate and preparation checklist matter. They provide context before any pattern in the scored plates is considered.
Should You Retake the Test?
Retaking the screening can be useful when the first attempt was affected by glare, an active display filter, an accidental answer, or an inconclusive control plate.
Before trying again, correct the problem and, if possible, use a different reliable display. Solvioza can present a different selection of plates where available, reducing the chance that you simply remember every previous answer.
Repeatedly taking the test until you receive a preferred result is not useful. The goal is to observe your color perception under reasonable conditions, not to obtain a particular score.
When to Speak With an Eye-Care Professional
Consider arranging a professional color vision assessment when:
- You repeatedly receive a possible-difficulty result under suitable conditions
- You regularly confuse colors in school, work, or daily tasks
- A school, employer, or licensing body requires formal color vision documentation
- You need to understand the type or severity of a suspected deficiency
- You remain concerned despite receiving an online result that appears normal
Bring your screening result if it helps you explain the concern, but expect the professional to perform their own assessment.
A Practical First Check, Used With the Right Expectations
An online color blindness test can give you a quick look at how you respond to colored-dot plates. Separate red-green and blue-yellow summaries can make the result easier to understand, while the control plate helps identify attempts that may not be reliable.
The most useful way to approach the test is simple: prepare your display, answer honestly, and treat the outcome as an indication rather than a diagnosis.
When you are ready, take the Solvioza Color Blindness Test. It takes about two minutes and provides a clear summary of your responses across all 15 plates.
