ColorContrast - Free Color Contrast Checker

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ColorContrast

Free online color contrast tools — WCAG AA & AAA compliance in seconds. All calculations run in your browser. No data ever uploaded.

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Contrast Checker
APCA Calculator
Accessible Palettes
Brand Color Checker
Extract Colors from Image
Color Blindness Simulator
Pie Chart Simulator
Color Blind Colors
Color Wheel
URL Contrast Checker
Gradient Checker
Button Checker
Link Checker

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Deuteranopia Simulator
Protanopia Simulator
Tritanopia Simulator
Achromatopsia Simulator
WCAG Checker
WCAG AA Checker
WCAG AAA Checker
Image Contrast Checker
Text Contrast
Heading Contrast
Form Input Contrast
Icon Contrast
HEX Color Checker
RGB Color Checker
HSL Color Checker

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Calculations follow WCAG 2.1, WCAG 3.0 Draft (APCA), and ADA.gov. Color blindness matrices based on Machado et al. (2009).