Color Blindness Simulator
See how your color choices look to people with different types of color vision deficiency — essential for accessible design.
Frequently Asked Questions
Color blindness (color vision deficiency) affects the ability to distinguish certain colors. It affects about 8% of men and 0.5% of women worldwide.
The main types are Deuteranopia (green-blind), Protanopia (red-blind), Tritanopia (blue-blind), and Achromatopsia (total color blindness — very rare).
Accessible color design ensures your website is usable by the estimated 300 million people with color vision deficiency worldwide.
WCAG 2.1 requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text to ensure readability for low-vision users.