Quick Answer
What types of color blindness does this simulate? Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), and Achromatopsia (complete color blindness). Red-green deficiencies affect about 8% of men.
Frequently Asked Questions
The simulator supports four main types: Protanopia (red-blind, affects ~1% of males), Deuteranopia (green-blind, affects ~1% of males), Tritanopia (blue-blind, rare at ~0.01%), and Achromatopsia (complete color blindness, very rare). Red-green deficiencies (Protanopia and Deuteranopia) are by far the most common.
The simulation uses scientifically-derived color transformation matrices based on established research. While no simulation perfectly replicates individual perception (which varies), these algorithms closely approximate how most people with each condition perceive colors.
Approximately 8% of men and 0.5% of women have some form of color vision deficiency. Testing ensures your charts, graphs, buttons, and UI elements remain distinguishable and usable. It is also a WCAG accessibility requirement to not rely solely on color to convey information.
The simulator accepts JPG, PNG, WebP, and GIF images up to 10MB. Processing happens entirely in your browser, so your images are never uploaded to any server.
Use high contrast between important elements. Add patterns, icons, or labels alongside color coding. Avoid red/green combinations for critical distinctions. Test with this simulator before finalizing. Consider using color-blind safe palettes like ColorBrewer.
Yes — the tool displays your original image alongside all four simulated versions simultaneously, making it easy to identify which color combinations cause problems across different types of color vision deficiency.