Color Vision Guides

How to make sense of your check results, how to cope in daily life and at work, and how to create material that people with color vision deficiency can read easily.

01 How Dot-Plate Color Vision Tests Work — Confusion Lines and Luminance Noise Why can some people see the number while others can't? The principle behind pseudoisochromatic plates and how Colorblind Lab computes its plates. 02 How Color Blindness Is Inherited — X-Linked Inheritance and Odds Table Why red-green color vision deficiency is far more common in men, the odds for children by parent combination, carriers, and how blue-yellow defects and achromatopsia are inherited differently. 03 Living with Color Blindness — Traffic Lights, Cooking, Clothes, Maps, Phone Settings Tips for judging by position, brightness, shape, and temperature instead of color; color filter settings on iPhone, Android, Windows, and Mac; and how to get support at school and work. 04 Color Vision Deficiency and Careers — Fields That Require Color Discrimination and How to Check Fields where color discrimination matters — aviation, maritime, rail, electrical work, police, firefighting, healthcare, design — why standards differ by country and organization, and what to check before choosing a path. 05 Colorblind-Friendly Palette Guide — Practical Rules for Designers and Developers Compare the Okabe-Ito and Paul Tol palettes alongside protan, deutan, and tritan simulations, plus design rules that don't rely on color: lightness contrast, redundant encoding, and WCAG criteria. 06 Color Vision Tests Compared — Ishihara, HRR, Anomaloscope, D-15, FM-100 The difference between screening and diagnostic tests, and a table comparing what pseudoisochromatic plates, arrangement tests, the anomaloscope, and computerized tests each reveal — and their limits. 07 Why Online Color Vision Tests Can Be Wrong — Screens, Lighting, Night Mode How monitor gamut and calibration, night mode and blue light filters, brightness, viewing angle, and ambient lighting change results — and the conditions for the most accurate check. 08 7 Myths About Color Blindness — A Black-and-White World? Corrective Glasses? Color-blind people see in black and white, women can't be color blind, glasses can fix it — setting common myths straight with research findings.