Upload any image and see how it looks to people with different types of color vision deficiency. Useful for accessibility testing of UI designs.
The Color Blindness Simulator shows you how images and color combinations appear to people with various types of color vision deficiency. Approximately 8% of men and 0.5% of women have some form of color blindness, the most common being red-green deficiencies (protanopia and deuteranopia), followed by blue-yellow deficiency (tritanopia) and complete color blindness (achromatopsia). This tool applies scientifically validated color transformation matrices to your uploaded image, rendering separate previews for each vision type side by side. Designers and developers use it to ensure that UI components, data visualizations, maps, and marketing materials remain clear and readable for color-blind users — an important aspect of inclusive design and WCAG accessibility compliance.
Upload any image using the file picker or drag-and-drop area. The tool renders the image through simulated filters for each major color blindness type and displays them side by side. Compare the previews to identify any color combinations that become indistinguishable and adjust your design accordingly.