Color Blindness Simulator

Simulate how colors appear to people with color vision deficiencies. Test protanopia, deuteranopia, and more.

Loading...
1. Enter a color using the hex or RGB input fields, or pick one visually with the color picker. 2. Select the type of color vision deficiency to simulate: protanopia, deuteranopia, tritanopia, or achromatopsia. 3. View the simulated color side by side with the original to see how it shifts under the selected condition. 4. Test multiple colors or an entire palette to identify combinations that become indistinguishable for colorblind users. 5. Use the results to choose more accessible alternatives, then verify your updated palette with the Color Contrast Checker tool.

About This Tool

The Color Blindness Simulator shows you how any color or color combination appears to people with different types of color vision deficiency. Enter colors or upload an image to see simulations for protanopia, deuteranopia, tritanopia, and other conditions that affect approximately 8% of men and 0.5% of women worldwide.

Color vision deficiency - commonly called color blindness - does not mean seeing in grayscale. Most affected individuals see colors, but certain hues are difficult to distinguish. Protanopia and deuteranopia (red-green deficiencies) are the most common, making it hard to tell reds from greens. Tritanopia (blue-yellow deficiency) is rarer but affects blue and yellow perception.

This tool is essential for designers and developers who want to ensure their work is accessible to everyone. By previewing your color choices through the lens of different deficiencies, you can identify problematic combinations early and choose alternatives that maintain clarity for all users. Pair this with the Color Contrast Checker for comprehensive accessibility testing.

Frequently Asked Questions

The most common types are protanopia and deuteranopia, both forms of red-green color blindness. Together they affect about 8% of males. Protanopia reduces sensitivity to red light, while deuteranopia reduces sensitivity to green light. Tritanopia (blue-yellow) is much rarer.
Avoid relying on color alone to convey information. Use patterns, labels, icons, or different shapes alongside color. Ensure sufficient contrast between adjacent colors. Test your palette with a simulator like this one, and avoid problematic pairs like red-green or blue-yellow.
Achromatopsia, or complete color blindness where a person sees only in shades of gray, is extremely rare - affecting roughly 1 in 30,000 people. The vast majority of people with color vision deficiency can see some colors but have difficulty distinguishing certain hues.
Yes, though it is much less common. Red-green color blindness is X-linked recessive, so about 8% of men are affected compared to about 0.5% of women. Women can be carriers without showing symptoms. Tritanopia is not sex-linked and affects men and women equally.
Digital simulators use established models (such as Brettel, Vienot, and Machado) to approximate how colors shift under different deficiencies. While they provide a good representation, individual variation in the severity and type of deficiency means real-world perception can differ somewhat.

Related Tools

Color Contrast Checker

Check color contrast ratios for WCAG AA and AAA compliance. Ensure your text is readable and accessible.

Color Tools

Color Palette Generator

Generate harmonious color palettes. Create complementary, analogous, triadic, and split-complementary schemes.

Color Tools

Color Picker

Pick any color visually and get values in hex, RGB, HSL, and CMYK. Interactive color wheel with precision.

Color Tools

Hex to RGB Converter

Convert hexadecimal color codes to RGB values instantly. Supports shorthand and 8-digit hex with alpha.

Color Tools

Color Name Finder

Find the closest named CSS color for any hex or RGB value. Identify colors by their standard names instantly.

Color Tools