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Color Blind Simulator - Free Online Developer Tool

A simple, focused color blind simulator for everyday use.

About Color Blind Simulator

Color Blind Simulator is a free, easy-to-use online developer tool from Code63 Apps.A simple, focused color blind simulator for everyday use. This tool has been used 1 times by people looking for a simple, no-signup solution.

How to Use Color Blind Simulator

  1. Enter your information in the form above
  2. The tool will process your input instantly
  3. View your results immediately - no waiting
  4. Your data stays private - everything runs in your browser

Frequently Asked Questions

What is Color Blind Simulator?

Color Blind Simulator is a free online developer tool. A simple, focused color blind simulator for everyday use.

Is Color Blind Simulator free to use?

Yes, Color Blind Simulator is completely free to use. No sign-up or registration required.

How do I use Color Blind Simulator?

Simply enter your information in the form above and the tool will calculate or generate results instantly. All processing happens in your browser.

Is my data safe with Color Blind Simulator?

Yes, your data never leaves your browser. Color Blind Simulator processes everything locally - we don't store or transmit your personal information.

Can I use Color Blind Simulator on mobile?

Yes, Color Blind Simulator is fully responsive and works on smartphones, tablets, and desktop computers.

Why Use Color Blind Simulator?

  • 100% Free - No hidden costs or premium features
  • No Sign-up Required - Start using immediately
  • Privacy-First - Your data never leaves your device
  • Fast Results - Instant calculations and outputs
  • Mobile-Friendly - Works on any device

Color Blind Simulator

A simple, focused color blind simulator for everyday use.

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Quick Answer

The Color Blind Simulator is a simple, everyday tool for developers to preview designs, websites, apps, maps, and charts as seen by people with color vision deficiency (CVD), affecting 300 million people worldwide[1]. It simulates key types like protanopia (red-blind), deuteranopia (green-blind), tritanopia (blue-yellow blind), and achromatopsia (grayscale), helping catch accessibility issues early to ensure inclusive, readable content[3][5].

Why You Need This

Color blindness impacts 8% of men and 0.5% of women globally, primarily red-green types, making it hard to distinguish hues in UI elements, data charts, graphs, worksheets, and maps[5]. This excludes users from color-coded content like unreadable links, buttons, alerts, or visuals, leading to up to 70% rework in design reviews[2]. Notable figures like Mark Zuckerberg and Prince William highlight its prevalence, affecting daily tasks for 300 million people—designers, educators, GIS pros, and data visualizers must test for protanopia, deuteranopia, tritanopia, and achromatopsia to build accessible products[3].

How It Works

Upload images, use live camera feeds, or input URLs to apply side-by-side or overlay simulations of normal vs. CVD vision, cycling through deficiency modes instantly[1][2][3]. Pair with contrast checks (aim for 4.5:1 normal text, 3:1 large text per WCAG) to spot blends in buttons, icons, charts, and maps[2]. Developers preview real-world scenarios like ArcGIS layouts or app screens during reviews, adjusting palettes like Okabe-Ito for CVD-safe results[2][3].

Tips for Best Results

  • Test early in workflows on top screens/flows in team meetings to fix colors, add patterns/icons/labels, and reduce rework[2].
  • Combine with WCAG tools for high contrast; retest adjusted designs until simulated views match normal readability[1][2].
  • Use for specific needs: educators on worksheets, GIS on maps, UI teams on apps—verify with non-color cues like textures[3][4].
  • Cycle all modes (protanopia, deuteranopia, tritanopia, achromatopsia) on real content for comprehensive inclusivity[3][5].

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