Adobe Spectrum vs GitHub Primer

Adobe Spectrum is Adobe’s design system, a shared foundation and language for creating experiences across Adobe products. It provides foundations, design tokens, patterns, components, and guidance intended to support consistent, flexible work. Component pages offer interactive playgrounds where users can explore live components and their properties; the playgrounds use component data connected to Spectrum repositories. Tokens capture reusable decisions about color, spacing, typography, motion, and sizing. Spectrum’s color guidance emphasizes accessibility, recommends meeting WCAG contrast minimums, and advises providing a label or icon so color is not the sole carrier of meaning. Typography guidance addresses consistent styles and behaviors, including text scaling with accessibility preferences on iOS and Android. Dedicated React and Web Components areas are available in beta; iOS, Android, and other platform areas are described as coming soon. Spectrum Hub provides foundational and implementation guidance, playgrounds, and contact options for feedback, bug reports, and inquiries. The September 2026 release describes the Hub as an initial release, with mobile documentation and unified experience guidance planned for later releases. Spectrum is listed as free and open source.

GitHub Primer is a free, open-source design system for designing and building GitHub interfaces. Its guidance covers product UI components, patterns, and design tokens for color, spacing, and typography. Primer Brand addresses marketing websites and other digital experiences. React documentation explains theming, recommended practices, and component extension. Primer also provides accessibility guidance and tools, along with Octicons, GitHub’s scalable icon set. Product UI documentation includes an MCP server page. Component status is identified as experimental, ready, or deprecated; ready components are described as mature with long-term support expected. Primer Web and Primer Primitives are available through the Primer Figma Community page, while GitHub’s Figma organization is limited to GitHub team members. The Primer Mobile Figma library is internal only. GitHub employees alone can contribute to Primer Web because of Figma’s open-source file handling. GitHub’s Design Infrastructure and Design Engineering teams maintain the CSS framework, documentation, tools, libraries, and component libraries.