# ColorBlindTests.net

> Free online color blind tests — Ishihara, red-green, blue-yellow, Cambridge, Farnsworth D-15, and Farnsworth-Munsell 100 Hue. Clinically-informed screening with instant results, used by people with color vision deficiency worldwide.

## Tests

- [Color Blind Test (Ishihara)](https://colorblindtests.net/ishihara-test): 38-plate Ishihara screening for red-green color blindness with instant results
- [Red-Green Color Blind Test](https://colorblindtests.net/red-green-color-blind-test): Specialized test for Protanopia and Deuteranopia detection
- [Blue-Yellow Color Blind Test](https://colorblindtests.net/blue-yellow-color-blind-test): Screen for Tritanopia and Tritanomaly
- [Kids Color Blind Test](https://colorblindtests.net/kids-color-blind-test): Age-appropriate color vision test for children
- [Cambridge Color Test](https://colorblindtests.net/cambridge-color-test): Landolt C rings in pseudoisochromatic noise, screening red-green and blue-yellow deficiency across 12 plates
- [Farnsworth D-15 Test (Clinical Guide)](https://colorblindtests.net/farnsworth-d-15-test): Original 1947 D-15 dichotomous arrangement test with instant protan/deutan/tritan classification, Vingrys & King-Smith scoring, lighting calibration, and occupational pass/fail standards (police, military, FBI, FAA)
- [D-15 Color Blind Test](https://colorblindtests.net/d15-color-blind-test): Quick 15-cap arrangement test for classifying color vision deficiency type and severity
- [Farnsworth-Munsell 100 Hue Test](https://colorblindtests.net/farnsworth-munsell-100-hue-test): Comprehensive color discrimination assessment with Total Error Score
- [Lantern Test (FALANT)](https://colorblindtests.net/lantern-test): Farnsworth Lantern signal-light test used by the Navy, FAA, and Coast Guard
- [Color Blindness Simulator](https://colorblindtests.net/color-blindness-simulator): Upload an image to see how it appears with protan, deutan, tritan, and achromatopsia vision

## Blog

- [Types of Color Blindness](https://colorblindtests.net/blog/types-of-color-blindness): Complete reference for protan, deutan, tritan, and achromatopsia
- [Genetics of Color Blindness](https://colorblindtests.net/blog/genetics-of-color-blindness): X-linked inheritance explained
- [Jobs for Colorblind People](https://colorblindtests.net/blog/jobs-for-colorblind-people): Career guide covering restricted and unrestricted professions
- [Driving with Color Blindness](https://colorblindtests.net/blog/driving-with-color-blindness): License rules in 20+ countries
- [Early Signs in Children](https://colorblindtests.net/blog/early-signs-child-color-blindness): Age-by-age detection guide for parents
- [How Color Blind Glasses Work](https://colorblindtests.net/blog/how-color-blind-glasses-work): The science behind EnChroma-style lenses and what they can and cannot do
- [Army Color Blind Requirements](https://colorblindtests.net/blog/army-color-blind-requirements): Military color vision standards by branch and specialty
- [How to Pass the Farnsworth D-15 Test](https://colorblindtests.net/blog/how-to-pass-farnsworth-d-15-test): What the D-15 measures and whether it can be practiced
- [Farnsworth D-15 vs Munsell 100 Hue](https://colorblindtests.net/blog/farnsworth-d-15-vs-munsell-100-hue): How the two arrangement tests differ and when each is used
- [Color Blindness FAQ](https://colorblindtests.net/blog/color-blindness-faq): Common questions about diagnosis, prevalence, and daily life

## Languages

All test pages and the homepage are available in English (default), Simplified Chinese (/zh/), Spanish (/es/), and German (/de/). Translations are full localizations, each independently indexable with hreflang declarations. Example: https://colorblindtests.net/zh/farnsworth-d-15-test

## Optional

- [llms-full.txt](https://colorblindtests.net/llms-full.txt): Extended information about all pages and content