Deutan, protan, tritan and monochromat perspectives in a colour-coded world.
8% of men, 0.5% of women2,850 members
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About 8% of men and 0.5% of women see colour differently. Board games, charts, cables and status lights still assume everyone tells red from green. This club rates games and tools by how they work without colour, and shares what the research really says about glasses and apps. Membership here is always private.
Swapped the categorical palette for one with luminance steps, added direct labels on every series, and put pattern fills on the two series that still collided. Screenshots under deutan/protan simulation attached in the w
Apps that read bands from a photo keep confusing brown and red under warm light. Do people use a multimeter instead, or is there an app that works?
The one I use for all my audits. Upload a screenshot, toggle deutan/protan/tritan.
Community audit · Sep 24, 2026
A community audit of the 200 most-played games found colour-blind options in 81 of them, up from 52 last year. Quality varies: some only recolour the HUD.
Member write-up · Sep 18, 2026
A practical write-up: which chart palettes failed, which patterns fixed them, and how to test with a simulator before shipping.
Editor's note · Sep 10, 2026
A peer-reviewed trial with 32 participants found some improvement in subjective contrast outdoors and no improvement on standard plate tests. Our research page has the details.
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Research · 1 min read
Some people report stronger contrast outdoors. Standard tests show little or no change. They don't treat or cure anything.
Data · 1 min read
Deutan and protan (red-green) are common; tritan (blue-yellow) is rare; complete colour blindness is rarer still.
Products are ranked by fit for this trait, with the evidence next to the score. Prices are ranges, never bait.