What is a color blindness simulator?

A color blindness simulator is a tool that applies mathematical transformations to colors or images to approximate how they might appear to someone with a specific type of color vision deficiency.

What types of color blindness are supported?

Our simulator supports Protanopia (red-blind), Protanomaly (red-weak), Deuteranopia (green-blind), Deuteranomaly (green-weak), Tritanopia (blue-blind), Tritanomaly (blue-weak), and Achromatopsia (total color blindness).

Are my uploaded images sent to a server?

No. All image processing happens locally within your browser using SVG filters. Your images are never uploaded, stored, or sent to any external server.

Is this simulator medically accurate?

No. This tool uses standard mathematical matrices designed for web accessibility testing. While they provide a strong approximation of how colors shift, real-world perception varies significantly between individuals and cannot be perfectly simulated on a standard monitor.

Why should designers care about color blindness?

Approximately 300 million people worldwide have some form of color vision deficiency. Simulating your designs helps ensure that critical information isn't communicated by color alone, and that your UI remains usable for everyone.

Tool

Color Blindness Simulator

Simulate how colors, user interfaces, and images appear to users with different forms of color vision deficiency.

Base Color

Select a color to see how it appears across different vision types.

#AA6238

Normal Vision

#aa6238

Protanopia

#909045

Protanomaly

#a0803f

Deuteranopia

#949948

Deuteranomaly

#9f7a40

Tritanopia

#a74e4f

Tritanomaly

#a85942

Achromatopsia

#7b7b7b

Achromatomaly

#937063

Important Note

This simulator uses mathematical approximations (transformation matrices) to demonstrate how colors might appear to individuals with various forms of color vision deficiency. It is intended for accessibility design testing and awareness, not for medical diagnosis. Real-world perception varies significantly between individuals.

About the Color Blindness Simulator

The Color Blindness Simulator helps developers, designers, and creators evaluate their work for accessibility. By applying standard transformation matrices, this tool demonstrates how visual assets might be perceived by individuals with Protanopia, Deuteranopia, Tritanopia, and other forms of color vision deficiency.

Why it matters

Roughly 1 in 12 men and 1 in 200 women have some form of color blindness, with Deuteranopia (green-blindness) being the most common. If a user interface relies entirely on color to communicate status (e.g., green for success, red for error), a significant portion of your audience may struggle to use your product.

Best Practices for Accessible Design

Never rely on color alone: Always pair color cues with icons, text labels, or distinct patterns.
Check contrast ratios: Ensure text has sufficient contrast against its background, regardless of the hue.
Use descriptive links: Avoid "click here" and use text that describes the destination, styling links with underlines in addition to color.