Cortena design tokens — the single source of truth for the Ascendence AI visual language.

Replace or remove multiple items in an array.

Generate colors based on a desired contrast ratio

ZUI — design tokens: one tokens.json (W3C DTCG) generating the light / dark CSS, a brand.css template, a typed name list and the shared WCAG contrast module

Get the contrast ratio and WCAG score between common CSS color types.

A Blockly colour field.

Determines the best contrast color to use. Give it a background color and it returns a foreground color (black or white by default but customizable).

A 1:1-in-progress port of `Theme Manager.dc.html` to **React 19 + TypeScript + MUI v7**, driven entirely by **theme tokens**: every control mutates a flat settings store, `buildMuiTheme()` compiles it into a MUI `createTheme()`, and one `<ThemeProvider>`

The Appshell design token contract, its presets, and contrast validation

A utility library for calculating luminance, contrast ratio, and appropriate contrast colors to ensure web accessibility.

SolidJS design system: semantic design tokens, dark/RTL-ready SCSS modules, a11y primitives

HollaCo design system — tokens, foundation and component CSS.

JupyterLab - Dark High Contrast Theme

A JavaScript library for colour data visualization. Easily map numbers to a smooth-transitioning colour legend.

Design tokens for the Charcuterie component library. Zero dependencies, no React.

ECL Colors

ECL Colors

A collection of functions for manipulating CSS colors, inspired by SASS.

performance-sensitive wcag contrast ratio calculation between two colors

Two-tier OKLCH design tokens in plain CSS for Dowel, with thirteen presets that all pass WCAG AA contrast in light and dark.