Color Contrast tools

Contrast Ratio

By Lea Verou.

Accessibility Color Wheel

Find an accessible color pair and compare contrast with simulation of three types of color deficiency: deuteranopia, protanopia and tritanopia.

Color Safe

Accessible color palettes based on WCAG Guidelines of text and background contrast ratios.

Color Palette Accessibility Evaluator

Online tool for analyzing color combinations that meet WCAG 2 a11y specifications.

Contrast Analyzer

Standalone tool; provides a pass/fail check for WCAG 2.0 contrast criteria; simulates certain visual conditions.