Color Blindness Simulator
Simulate protanopia, deuteranopia, tritanopia, and other color vision deficiencies. Check color accessibility for designers.
Specialist tool for Color ToolsLive, copy-ready output1 guided projectPrivate in your browser
Use this result well
A quick decision brief for this specific tool
Inputs that matter
HEX Color
Output to expect
Simulated Colors
How it works
A dedicated interactive panel for this data format or operation
- Start with the included valid sample, then replace it with your own input.
- Review errors and compare the output before replacing source data.
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Projects using Color Blindness Simulator
This tool is part of these guided projects. Each project provides step-by-step instructions with checklists and all the tools you need in one place.
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Reference & details
How it works
Updated July 2026
How it works
Updated July 2026Color Space Conversion
The Color Blindness Simulator converts between RGB, HSL, HSV, and hex using standard linear transforms. Gamma-correct sRGB values are assumed unless otherwise noted.
HSL ↔ RGB via standard cylindrical transformAccessibility Checks
Contrast ratios are computed per WCAG 2.1 relative luminance formula. Results indicate AA and AAA compliance for normal and large text.
Contrast = (L1 + 0.05) / (L2 + 0.05)Output Formatting
Generated values are emitted in copy-ready formats (hex, CSS, Tailwind, SVG). Precision is tuned for design tools without unnecessary floating-point noise.
Updated: July 2026
Example Scenarios
A UI designer uses the Color Blindness Simulator to explore complementary colors and verify WCAG contrast before handing specs to developers.
A front-end developer checks spacing, ratio, or typography values with the Color Blindness Simulator while implementing a Figma mockup in CSS.
A freelancer generates live examples with the Color Blindness Simulator during a client call to agree on visual direction without switching tools.
FAQ
Yes, all processing happens in your browser. No data is sent to any server — your input stays on your device and is never stored or logged.
Yes, it's completely free with no registration required. Use the Color Blindness Simulator as often as you need with no limits, accounts, or subscriptions.
Once loaded, the tool runs entirely in your browser without needing a constant connection. Your data is processed locally for speed and privacy.
Color-related tools compute WCAG contrast ratios when foreground and background colors are provided. Aim for AA (4.5:1 normal text) or AAA (7:1) for body copy on public-facing sites.
The Color Blindness Simulator uses established formulas and reference data for this domain. Results are computed with standard floating-point precision and rounded for readability. Always verify critical values against primary sources or a qualified professional.
About Color Blindness Simulator
Use our free Color Blindness Simulator for fast, accurate results in your browser. No signup or installation required — works on any device.