Color Contrast Checker
Generate accessible color palettes, check WCAG and APCA contrast, preview typography, simulate color-vision conditions, and export CSS, Tailwind, JSON, and W3C design tokens. This free online color contrast checker reports WCAG 2.2 contrast ratios and APCA Lc, flags AA and AAA status, and suggests accessible color fixes for ADA-minded accessibility work.
| Token | APCA | WCAG | AA | Use |
|---|
Check WCAG 2.2 contrast
Review WCAG 2.2 contrast ratios and AA/AAA status while tuning palette and typography settings.
Check APCA (perceptual) contrast
Inspect APCA Lc guidance alongside WCAG ratios for modern perceptual contrast decisions.
Build accessible palettes
Generate accessible color scales from a brand color and validate pairings against a surface.
Export design tokens & Tailwind
Export CSS variables, Tailwind colors, JSON, W3C-style tokens, audits, and bundle handoffs.
Color Contrast Checker FAQ
What is ALT Color Contrast Checker?
ALT Color Contrast Checker is a free color contrast checker and accessibility checker that tests WCAG and APCA contrast, generates accessible color palettes, previews typography, simulates color vision, and exports design tokens.
Is it a free online color contrast checker?
Yes. It is a free online color contrast checker that runs entirely in your browser, with no signup, no upload, and no data leaving your device.
Does it check WCAG and APCA contrast ratios?
Yes. It reports WCAG 2.2 contrast ratios with AA and AAA pass or fail status, plus APCA Lc readability guidance, for every foreground and background pair.
Can it suggest accessible color fixes?
Yes. When a pair fails, the tool suggests the nearest compliant color, preserving hue and saturation, so you can reach an accessible contrast ratio quickly.
Can it generate Tailwind colors and design tokens?
Yes. It works as a color palette and contrast generator, exporting CSS variables, Tailwind color config, JSON, and W3C-style design tokens, plus a bundled ZIP handoff.
Does it help with ADA and accessibility compliance?
ADA web accessibility expectations are commonly mapped to WCAG. This color accessibility checker measures WCAG 2.2 contrast so you can document accessible color choices, though full compliance depends on your entire site.