Color blind test is a test used to evaluate people's ability to perceive colorsEvaluate your color vision with the Color blind Test and uncover any color deficiencies.
Test catalog
Pick a comprehensive screen or a focused test for red-green, blue-yellow, mosaic, Ishihara, or lantern patterns.
Ishihara-style plates to screen red-green and related color vision deficiencies in about 3 minutes.
Focuses on C-shaped patterns used to identify protan and deutan color blindness type and severity.
Identify the gap in a C shape to help screen for Tritan (blue-yellow) color vision issues.
Click the odd square in a mosaic. Contains flickering - skip if you are photosensitive. About 1-3 minutes.
A classic plate-based screening used for over a century. Enter the numbers you can identify.
Identify vertically paired signal lights (red, green, yellow) - inspired by nighttime signal recognition.
A color blind test screens color discrimination with plates or hue tasks. Ishihara plates are the most common: people with typical color vision and people with red-green deficiency often read different numbers on the same image.
How it works
Use moderate brightness, avoid glare, and turn off night mode or heavy blue-light filters.
Each plate shows a number in colored dots. Select the digit you see - do not guess.
After every 6 questions, continue to the next stage. Finish all 24 for a reference report.
Knowledge base
L-cone related difficulty with reds and some dark color pairs.
Most common red-green type; maps and traffic lights may be affected.
Less common; blues, greens, and yellows may be harder to separate.
Rare severe cases with little color and often light sensitivity - needs specialist care.
Online plates are useful for a first look at red-green issues, but they cannot replace clinic exams or legal certificates for driving and employment.
Disclaimer: Results are for self-screening only and are not a medical diagnosis.
Trust & standards
Flow follows Ishihara-style screening logic across staged question groups.
Keyboard answering, visible focus, and high-contrast text targets.
Answers stay in browser storage for the current report session.
Educational copy is maintained with this site. Review reference: 2026-07-01.
FAQ