Simulate how colors and images appear to people with different types of color vision deficiency. Supports protanopia, deuteranopia, tritanopia, and achromatopsia.
Protanopia
Red-blind
#418EFA
Deuteranopia
Green-blind
#007DF4
Tritanopia
Blue-blind
#009EB0
Achromatopsia
Total color blindness
#858585
Color vision deficiency simulation uses Brettel/Vienot transformation matrices applied to linearized sRGB values. Results are approximations and may not perfectly match individual experiences. About 8% of males and 0.5% of females have some form of color vision deficiency.
LevnTools Colorblind Simulator lets you explore and convert colors directly in your browser. Everything runs locally in your browser — your colors and palettes never leave your device. Unlike cloud-only alternatives that require uploads and accounts, this tool is completely free with no usage limits or watermarks. It is designed for designers building consistent color systems, developers implementing brand guidelines, artists exploring complementary palettes — anyone who needs a fast, reliable color tool without the overhead of installing software. Just open the page and start working.
Colorblind Simulator is used by a wide range of people. Explore how different groups use this tool:
Pick colors visually and convert between HEX, RGB, HSL, CMYK.
Convert colors between HEX, RGB, HSL, CMYK, and HSB.
Generate harmonious color palettes with multiple modes.
Resize images with custom dimensions, percentage, or social media presets.
Generate favicons from text or emoji instantly.
Four types: Protanopia (red-blind, ~1% of males), Deuteranopia (green-blind, ~1% of males), Tritanopia (blue-blind, very rare), and Achromatopsia (complete color blindness, ~1 in 30,000).
The tool uses Brettel/Vienot transformation matrices applied to linearized sRGB values. These are scientifically validated approximations but may not perfectly match every individual experience, as color vision deficiency exists on a spectrum.
Yes. In Single Color mode, enter a hex color to see how it appears under each deficiency type side by side. In Image mode, upload any image to see the original and simulated versions.
No. All processing happens entirely in your browser using Canvas. Your image data is never sent to any server.