RGBlind – Test Color Accessibility
Build Inclusive Designs
RGBlind provides professional tools for testing color blindness, generating accessible palettes, and ensuring WCAG compliance. Help 300 million people see your designs clearly.
Complete Accessibility Testing Suite
Tools for designers and developers who care about inclusive design
Color Blindness Simulator
Test images across 8 types of color vision deficiencies. Upload files or use live camera for real-time simulation.
Palette Generator
Create accessible color palettes with built-in testing for all color blindness types and WCAG contrast ratios.
WCAG Contrast Checker
Verify color contrast meets WCAG AA and AAA standards with instant validation and detailed compliance reports.
Color Blind Color Picker
Pick any color and see it under protanopia, deuteranopia and tritanopia, with text contrast and safer alternatives.
Ishihara Vision Test
Take the classic Ishihara test online with 37 plates that screen for red-green color vision deficiencies.
Color Perception Test
Interactive hue discrimination test to assess your color perception accuracy with instant scoring.
Website Checker
Test any live website for color accessibility with instant previews across different vision deficiencies.
Farnsworth D-15 Test
Arrange 15 color caps into a smooth hue run. Scores your crossings and points to the likely confusion axis.
Color Pair Checker
Check whether two colors stay distinguishable across eight vision types, and whether lightness rescues the pair.
Daltonize CSS Filter
Generate a copy-paste SVG and CSS filter that corrects or simulates color blindness, from real published models.
Color Name Identifier
Click any point in a photo and find out what color it is, with hex, RGB and how confident the match is.
Colormap Generator
Build sequential and diverging color scales for heatmaps, scored on whether lightness survives color blindness.
Kids Color Blind Test
Child-friendly color blindness screening with fun shapes and animals designed for young children.
Making the Web Accessible for Everyone
Around 1 in 12 men and 1 in 200 women experience some form of color vision deficiency. That comes to hundreds of millions of people who see the web differently than its designers intended, and color accessibility still gets skipped in most design work.
We built these tools to change that. Designers use them to check a new brand, developers to test a product before release, and teachers to show what color vision deficiency actually looks like. Everything on the site is free, and none of it requires an account.
Catching accessibility problems early saves time, money, and frustration. The simulators, contrast checkers, and palette generators here let you find them before your users do. The result is a clearer experience for people with color vision differences, and usually a clearer one for everybody else.
Why Color Accessibility Matters
Reach More Users
Ensure your designs work for the 8% of men and 0.5% of women with color vision deficiencies.
Meet Compliance
Satisfy WCAG 2.1 AA/AAA requirements and avoid legal issues with accessible designs.
Better UX
Accessible designs with good contrast and color choices improve usability for everyone.
Inclusive Design
Build products that work for diverse users in different environments and conditions.
Built for Modern Design Teams
Fast, accurate, and free accessibility testing tools trusted by designers and developers worldwide
Lightning Fast
WebGL-accelerated simulations process images in under 2 seconds. Test quickly without waiting.
Mobile-First Design
Fully responsive tools that work perfectly on phones, tablets, and desktops with touch support.
Accurate Simulations
Based on peer-reviewed research from Machado et al. for scientifically accurate results.
For Professionals
Trusted by designers, developers, and accessibility specialists for production work.
Privacy Protected
All processing happens in your browser. Your images and data never leave your device.
Free Forever
No accounts, no paywalls, no limits. Professional tools accessible to everyone.
Support RGBlind
Help us improve our free accessibility tools by supporting the project. Your contribution keeps these tools free and accessible for everyone.
DonateReady to Build More Accessible Designs?
Join thousands of designers and developers creating inclusive experiences. Start testing for free today.