WebAIM Contrast Checker
The WebAIM Contrast Checker is a developer tool designed to calculate color contrast ratios for foreground and background colors in RGB hexadecimal format. It evaluates color combinations against WCAG 2.0 and 2.1 specifications, providing compliance results for normal text, large text, and graphical user interface components across AA and AAA levels. Features include transparency adjustment via Alpha values, a lightness slider, and a color picker to ensure web interfaces meet accessibility standards.
Checked on Sep 30, 2026.
Alternative resources
Radix Colors
An accessible, scalable color system for user interfaces with built-in dark mode support and APCA contrast ratios.
EnigmaEasel
AI-powered design suite for generating color palettes, gradients, font pairings, and performing WCAG accessibility audits.
Realtime Colors
A web-based tool to visualize color palettes and typography on a live website template, featuring a built-in contrast checker and export options.