UmbralXpectra
Test which color differences you can see

UmbralXpectra screenshot: Test which color differences you can see

About the app

Spanish-language browser test that measures which color differences a person can separate on this screen, aimed at color-blind users. Each step shows a circle split into two halves along one of four color axes, and the player answers same or different. The result is a personal profile that can be exported and imported as JSON, not a clinical diagnosis. Built with Grok.

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