Color Blindness Simulator

New

See images and palettes as people with color vision deficiencies do.

How to use the Color Blindness Simulator

1Drop an image or screenshot, or enter a palette.
2Switch between protanopia, deuteranopia, tritanopia and more.
3Compare side by side and adjust the severity.

Color Contrast Checker
New
Check text and UI colors against WCAG AA and AAA contrast rules.
Palette Contrast Grid
New
Test every color pair in a palette for accessible contrast at once.
HTML Accessibility Checker
New
Paste HTML and find missing alt text, labels, heading and ARIA issues.