# Spectrum

The standard CSS implementation of the Spectrum design language.

Repository: https://github.com/adobe/spectrum-css
Canonical: https://ross.abutalabs.com/products/spectrum
Homepage: http://opensource.adobe.com/spectrum-css/
Language: CSS
License: Apache-2.0
License Family: permissive
Topics: css, design-system
Last push: 2026-08-26T10:35:54+00:00
Link (homepage): http://opensource.adobe.com/spectrum-css/

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 2858, "days_push": 7, "days_rel": 352, "gap_med": 0, "n_releases_24m": 846}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1289, forks 214 (observed 2026-08-28T04:04:15.194313+00:00)

## What it is
React Spectrum is a collection of libraries implementing Adobe's Spectrum design system, including styled components (React Spectrum), unstyled accessible hooks and components (React Aria), cross-platform state management hooks (React Stately), and internationalization utilities. It emphasizes WAI-ARIA-compliant accessibility, adaptive mouse/touch/keyboard interactions, and theming with dark mode support.

## Use cases
- build accessible react ui components
- implement adobe spectrum design system in react
- unstyled accessible hooks for custom design system
- internationalized date and number formatting in react
- components with keyboard and screen reader support
- dark mode theming for react components
- cross-platform state management for ui components

## When to choose
- you need highly accessible WAI-ARIA compliant React components
- you want a complete styled component library matching Adobe's design language
- you're building a custom design system and need behavior/accessibility hooks without styling
- your app needs broad internationalization including RTL support

## When to avoid
- you use a framework other than React (consider Spectrum Web Components instead)
- you want a minimal bundle and don't care about accessibility or i18n
- you need a design system unrelated to Adobe's Spectrum visual style

## Facets
- artifact type: library
- maturity: stable
- function: ui-components, frontend-framework, internationalization, accessibility, state-management, css-framework
- domain: web-development, frontend, accessibility
- platform: cross-platform
- tags: design-system, react-aria, react-stately, spectrum-css, web-components, wai-aria, theming, adobe, localization, design-systems, web, nodejs

## Member repositories
- adobe/spectrum-css (main) score 77
- adobe/react-spectrum (sdk) score 94
- adobe/spectrum-web-components (sdk) score 86

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:15.194313+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:05:31.649943+00:00, confidence not recorded.
  - readme: https://github.com/adobe/spectrum-css (fetched 2026-08-28T04:04:15.194313+00:00, sha 4bf576ae5215)
  - homepage: http://opensource.adobe.com/spectrum-css/ (fetched 2026-08-29T08:04:04.417702+00:00, sha 41c2af9628be)
- Data as of 2026-08-30T08:39:29.467469+00:00.