Color Blindness Test
Identify the hidden numbers in the plates. Based on the Ishihara standard.
Ready to test your color vision?
We will show you a series of 12 plates. Enter the number you see.
Note: Adjust your screen brightness to maximum and turn off any "Night Light" or color filters for accurate results.
About the Color Blindness Test
The Ishihara Color Blindness Test is the most widely used screening method for detecting red-green color vision deficiencies. Developed by Dr. Shinobu Ishihara in 1917, it uses a series of dotted plates where a number is hidden within a pattern of colored circles.
Color vision deficiency affects approximately 8% of men and 0.5% of women worldwide. The most common types include:
- Protanopia: Reduced sensitivity to red light, making reds appear darker.
- Deuteranopia: Reduced sensitivity to green light — the most common type of color blindness.
- Tritanopia: Difficulty distinguishing between blue and yellow hues (very rare).
How to Use This Test
- Set your screen brightness to maximum and disable any Night Light or blue-light filters.
- Click Start Test to begin the 12-plate screening.
- Look at each colored plate and enter the number you see using the on-screen numpad.
- If you cannot see any number, click the "Nothing" button.
- After all plates, you'll receive a detailed breakdown of your color vision profile.
Pro Tips
- Maximize Brightness: Low screen brightness can alter how colors appear and lead to inaccurate results.
- Disable Color Filters: Turn off Night Light (Windows), Night Shift (Mac/iOS), or any accessibility color overlays before testing.
- Natural Lighting: Avoid testing in very dim or very bright ambient lighting, as it can affect how your eyes perceive screen colors.
- Calibrate Your Display: Use our Color Accuracy Test to ensure your monitor is displaying colors correctly before running this test.
Frequently Asked Questions
Is this a medical diagnosis?
No. This online screening test is a helpful indicator but not a substitute for a professional eye examination. If the test suggests a color vision deficiency, consult an optometrist or ophthalmologist for a thorough clinical evaluation.
What are the different types of color blindness?
The most common types are protanopia (red-blind), deuteranopia (green-blind), and tritanopia (blue-blind). Protanopia and deuteranopia together are called "red-green color blindness" and account for 99% of all cases.
Can color blindness be cured?
There is currently no cure for inherited color blindness. However, special glasses (like EnChroma) and contact lenses can enhance color perception for some people. Acquired color blindness from medication or disease may improve once the underlying cause is treated.
Related Tools
Explore more visual and display testing tools:
- Color Accuracy Test — Check if your monitor displays colors accurately.
- Display Test — Run a full suite of monitor quality checks.
- Dead Pixel Test — Scan your screen for stuck or dead pixels.