ShadeSurfer Color Blindness Simulator

Instantly test your website's accessibility by simulating how color-blind users experience your design and color schemes.

Stop guessing about web accessibility. See your designs exactly how color-blind users see them so you can catch contrast issues and accessibility failures immediately. The ShadeSurfer Color Blindness Simulator is a professional testing tool built specifically for UX/UI designers, web developers, and QA testers. Just open the extension, apply a vision filter, and instantly simulate how your webpage looks to users with different forms of color vision deficiency. Key Features: • Comprehensive Accessibility Testing: Simulate four scientifically accurate profiles including Protanopia (Red-Blind), Deuteranopia (Green-Blind), Tritanopia (Blue-Blind), and Achromatopsia (Complete Grayscale). • Advanced Visual Controls: Fine-tune the simulation with adjustable intensity and contrast sliders to test edge cases and specific vision thresholds. • Real-Time Color Scheme: Instantly preview exactly how the simulation alters common problem colors right inside the extension window. • Color Palette Extraction: Select "View Palette" to grab the exact HEX codes of the filtered colors and turn them into an editable color scheme. • Smart Swatch Features: Load your tested colors on shadesurfer.io in a flash to export them as an image file, grab a shareable link, and explore complementary tones. Why do you need this extension? Imagine building a checkout page on your website where a declined card turns the input box red and an approved card turns it green. To a non-color blind person that contrast is obvious. But toggle on the Protanopia or Deuteranopia filter in this simulator and watch what happens. To a user with red-green color blindness, both boxes look like a muddy brownish-yellow. They literally cannot tell if their order went through. Catch this accessibility disaster in real time so you know to add clear icons or text so your webpage works for everyone. This tool is perfect for auditing contrast, ensuring a smooth browsing experience, and building a fully accessible internet. Turn any webpage into an accessibility testing environment with the ShadeSurfer Color Blindness Simulator today. Powered by shadesurfer.io