Color Blindness Helper

Correct website colors for color blind users, simulate color blindness, name any color on screen, and take a color vision test.

Color blind? See the web clearly. About 1 in 12 men and 1 in 200 women have a color vision deficiency. Red and green buttons, chart lines, map legends and status dots can look exactly the same. Color Blindness Helper fixes that on every website. 🎯 CORRECT MODE — REAL HELP, NOT JUST A SIMULATION Shifts the colors you can't tell apart into colors you can (daltonization). Works for red-blind (protan), green-blind (deutan) and blue-blind (tritan) vision, with adjustable severity and strength. 👁️ COLOR PICKER — KNOW EVERY COLOR BY NAME Point at anything on the page to see its color name (English or Thai), HEX and RGB. Click to copy. Shortcut: Alt+Shift+P. 🧪 COLOR VISION TEST Not sure which type you have? Take the quick 8-plate screening test and apply the recommended settings in one click. (Screening only — not a medical diagnosis.) 🎨 SIMULATE MODE — FOR DESIGNERS AND DEVELOPERS See your website the way people with protanopia, deuteranopia, tritanopia or achromatopsia see it (Machado et al. 2009 model). ✨ MADE FOR EVERYDAY USE • Per-site settings: turn the filter off on some sites, or give a site its own settings • Keyboard shortcut: Alt+Shift+C turns the filter on/off • "ON" badge on the toolbar icon when the filter is active • Contrast, saturation and brightness controls • Thai and English interface, light and dark themes • Changes apply instantly, no page flash 🔒 PRIVATE BY DESIGN • No data collection, no analytics, no tracking, no external connections • Settings are stored only in your browser • The color picker reads a screenshot of the visible tab in memory only — nothing is saved or uploaded ☕ Free and ad-free. If it helps you, you can support development on Ko-fi: https://ko-fi.com/soratornkongvut WHAT'S NEW IN 2.0 • New Correct (daltonization) mode • Color picker with color names • Color vision test and welcome page • Contrast / saturation / brightness • Per-site settings, keyboard shortcuts, ON badge • Thai language, dark mode, redesigned popup • Fixed: the strength slider no longer fades the whole page