Color Blindness Simulator
Color Blindness Simulator is a free online simulator that helps you simulate how any color looks to people with color blindness; protanopia, deuteranopia and tritanopia. Color Blindness Simulator uses 1 input field, returns 5 output values, and runs in your browser on the device.
Key facts
- Inputs
- 1 field: Color
- Outputs
- 5 values: Original, Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), and Summary
- Runtime
- your browser on the device
- Mode
- Simulator
- Privacy
- Files and text stay in the browser session.
- Cost
- $0, no account required
How to use Color Blindness Simulator
- 1
Paste or fill in the input
Enter your text or values into the input fields on the page.
- 2
Run the utility
Click Compute to run the utility in your browser and review the result.
- 3
Copy the output
Copy the output value you need from the result panel.
Color Blindness Simulator details
First, enter Color in Color Blindness Simulator. Next, review Original, Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), and Summary. Additionally, Color Blindness Simulator uses 1 input field and 5 output blocks so the result is easy to scan and copy.
Enter any color (hex, RGB, HSL, or CSS name) to instantly see how it appears to people with the three main types of color vision deficiency: protanopia (red-blind, ~1% of males), deuteranopia (green-blind, ~1% of males), and tritanopia (blue-blind, ~0.003% of population). Uses Brettel/Viénot/Mollon color transformation matrices applied in linearized sRGB space for accurate simulation. Essential for web designers and developers ensuring WCAG accessibility, UI/UX professionals, graphic designers, and anyone building inclusive color palettes. All processing runs locally in your browser; the color never leaves your machine.
Common searches
- color blindness simulator
- color blind simulator
- colorblind test
- protanopia simulator
- deuteranopia simulator
- tritanopia simulator
Related tools
Tools that work with the same formats — most users open one of these next.
WCAG Contrast Checker
Check WCAG 2.1 contrast ratio for any foreground/background pair — AA & AAA, normal & large text.
Color Converter
Convert any color (hex, rgb, hsl, hsv, named) to every common format at once — runs locally in your browser.
Complementary Color Generator
Find the complementary (opposite) color for any hex / rgb / hsl input — instant, free, no upload.
Triadic Colors Generator
Generate a balanced 3-color triadic palette from any base color — runs locally, free.
Analogous Colors Generator
Generate an analogous 3-color palette (±30° hue) from any base color — instant, local.
Shade & Tint Generator
Generate N evenly-spaced shades (darker) and tints (lighter) of any base color — runs locally.
Frequently asked
What is Color Blindness Simulator?
Color Blindness Simulator is a free online simulator that helps you simulate how any color looks to people with color blindness; protanopia, deuteranopia and tritanopia. Color Blindness Simulator uses 1 input field, returns 5 output values, and runs in your browser on the device.
What inputs and outputs does Color Blindness Simulator use?
Color Blindness Simulator uses 1 input field: Color. Color Blindness Simulator returns 5 output values: Original, Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), and Summary.
Do my files and data stay private?
Yes. Color Blindness Simulator runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How do I use Color Blindness Simulator?
Open Color Blindness Simulator, paste or fill in the input fields, and the result updates instantly. Color Blindness Simulator runs in your browser with no upload and no waiting.
Which browsers does Color Blindness Simulator support?
Any modern browser works in Chrome, Firefox, Safari, and Edge on desktop and mobile. Color Blindness Simulator uses standard web APIs and does not require any plugin, extension, or sign-up.