Contrast Checker & Color Blindness Simulator
Check whether the contrast between text and background meets WCAG standards, and preview how colors look to color-blind users.
Color Settings
WCAG Contrast Score
21.00
Contrast Ratio
Normal Text
AA (4.5:1)
AAA (7.0:1)
Large Text (18pt+)
AA (3.0:1)
AAA (4.5:1)
Preview
This is a paragraph of regular-sized text. Good contrast improves readability, especially for users with visual impairments.
This is smaller text that may require higher contrast to read clearly.
Color Blindness Simulation
Normal Vision
No color blindness
Protanopia
Protanopia (Red-blind)
Deuteranopia
Deuteranopia (Green-blind)
Tritanopia
Tritanopia (Blue-blind)
Achromatopsia
Achromatopsia (Mono)