Audit UI Designs for Accessibility

Check your app UI screenshots in CVD modes — make sure all state indicators are visible to everyone.

Nid oes angen mewngofnodiMae ffeiliau'n aros yn breifat

Gollwng ffeiliau yma, neu cliciwch i bori

JPG, PNG, WebP dim cyfyngiad maint ffeil

Pori ffeiliau

Nid yw eich ffeiliau byth yn gadael eich dyfais. Mae'r holl brosesu yn digwydd yn lleol yn eich porwr.

Upload a design, infographic, or photo to see how it appears to people with color vision deficiencies. Especially useful for: chart designers, UX designers, and accessibility audits.

UI Design tips

🎨

Common UI accessibility fail: status indicators in red/green only (errors red, success green). For deuteranopes, these look similar.

💡

Always pair color with a non-color cue: icons (✓/✗), bold text, borders, or words ("Error", "OK").

🎯

Test your app's key screens in deuteranomaly mode — the most common form (~5% of men). If your UI breaks here, it fails for millions of users.

Sut Mae'n Gweithio

Dewiswch Ffeil

Drop your file into the tool above. It stays entirely on your device — nothing is sent to any server.

Proses

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Lawrlwythwch

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

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✓Hollol rhad ac am ddim - dim costau cudd, byth

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✓Nid yw ffeiliau byth yn gadael eich dyfais

✓Dim cyfyngiadau maint ffeil o gwbl

✓Dim dyfrnodau ar unrhyw allbwn

Also check out…

📊

Audit Charts and Graphs for Color Blindness

Test data visualizations to ensure they're underst

🖨️

Test Print Designs for Color Accessibility

Posters, infographics, and printed materials all b

📷

Photographer Color Education

Photographers can use the simulator to understand

🎓

Teach About Color Vision Deficiency

Demonstrate to students, designers, or developers

Cwestiynau Cyffredin

Back to Color Blindness Simulator