contrast

Accessibility suite with Figma, Sketch and browser plugins covering contrast, focus order, alt text and vision simulation.

Spacebar-driven palette generator with 10M+ browsable palettes, image colour extraction, contrast checking, gradient tools and palette mockup previews.

Two-color pairing tool that shows every combination rendered as real UI so you can judge legibility, not swatches.

JavaScript library that generates colors from a target APCA contrast value instead of picking a color and checking after.

Command-line tool that checks colour contrast across a palette or config file, suitable for CI pipelines.

Enter a foreground and background pair and see, per vision-type, which real groups of people can actually read it.

Stripe engineering post on building a colour system that guarantees contrast ratios while preserving brand hue relationships.

Lightweight open-source contrast checker for Figma that samples selected layers and reports pass/fail without leaving the canvas.

Figma plugin that measures contrast between overlapping layers using APCA, accounting for blend modes, opacity and stacked backgrounds.

Tool that suggests the nearest passing colour alternatives when a pair fails contrast, instead of just reporting failure.

Minimal matrix that cross-checks every color in a palette against every other for WCAG contrast in one glance.

Adobe's contrast-first colour tool: define target contrast ratios and it generates the colours, plus adaptive theme output.

Color system builder that generates full tonal scales from a few seeds and checks WCAG and APCA across every pairing.