# rebassjs/rebass

:atom_symbol: React primitive UI components built with styled-system.

Repository: https://github.com/rebassjs/rebass
Canonical: https://ross.abutalabs.com/products/rebass
Homepage: https://rebassjs.org
Language: JavaScript
License: MIT
License Family: permissive
Topics: javascript, react, css, ui, styled-components, rebass, design-system, react-components, styled-system, components, grid, typography, layout, color, theme, emotion
Last push: 2023-07-27T03:42:53+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4221, "days_push": 1133, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 7904, forks 631 (observed 2026-08-28T04:10:09.375731+00:00)

## What it is
Rebass is a library of React primitive UI components built on top of Styled System, providing themeable, stateless building blocks for layout, typography, and color. It enables design systems with consistent, constraint-based styling via theme objects.

## Use cases
- build a react design system with themeable components
- style react components with a spacing and typography scale
- create consistent layout grids and boxes in react
- theme react apps with styled-system utilities
- use presentational react primitives with emotion or styled-components

## When to choose
- you want small, unopinionated, themeable React primitives rather than a full component kit
- your project already uses styled-system, styled-components, or emotion
- you need a lightweight foundation for a custom design system

## When to avoid
- you need batteries-included components like date pickers, tables, or modals
- you want a library with frequent releases and active maintenance
- you prefer CSS-in-JS solutions outside styled-system/emotion

## Facets
- artifact type: library
- maturity: maintenance
- function: ui-components, css-framework, theme
- domain: frontend, web-development, web-design
- platform: browser, cross-platform
- tags: react, styled-system, design-system, theming, layout, typography, styled-components, emotion, nodejs

## Member repositories
- rebassjs/rebass (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:09.375731+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 2026-08-29T17:33:23.542663+00:00, confidence not recorded.
  - readme: https://github.com/rebassjs/rebass (fetched 2026-08-28T04:10:09.375731+00:00, sha 66582300f36a)
  - registry_npm: https://registry.npmjs.org/rebass (fetched 2026-08-29T08:30:19.402162+00:00, sha 6776c08ded28)
- Data as of 2026-08-30T08:39:29.467469+00:00.