The goal of this project is to create a system that enables GitHub to build consistent user experiences with ease, yet with enough flexibility to support the broad spectrum of GitHub websites.
This is free and open source software.
Key Features
- Highly reusable, flexible styles – they can be mixed and matched to achieve many different layouts, independent of their location. They can be divided into 2 types:
- Utilities – single purpose, immutable styles, that do one thing well.
- Components – abstracted patterns for frequently used visual styles.
- Highly composable base-8 spacing scale.
- Customizable typography – Font size and line-height options work together to result in more sensible numbers. Font styles come in a range of weights and sizes so that we can style appropriately for content and readability. Change the visual styles while keeping markup semantic.
- Meaningful color – add meaningful signals to content and interactions. Color variables and utilities offer thematic styling options without being tied to structure. Text and background colors come in a range of accessible combinations to ensure we build inclusive interfaces.
Website: github.com/primer/css
Support:
Developer: GitHub Inc.
License: MIT License
Primer is written in SCSS. Learn CSS with our recommended free books and free tutorials.
Related Software
| CSS Front-end Frameworks | |
|---|---|
| Tailwind CSS | Utility-first CSS framework for rapidly building custom user interfaces |
| Bulma | Modern CSS framework that just works |
| Foundation | Advanced responsive front-end framework |
| Bootstrap | Sleek, intuitive, and powerful mobile front-end framework |
| Ulkit | Lightweight and modular front-end framework |
| Primer | GitHub’s design system |
| Cirrus | SCSS framework for the modern web |
| Fomantic-UI | Community fork of Semantic-UI |
| Vanilla | Extensible CSS framework, built using Sass |
| Materialize | Modern responsive front-end framework based on Material Design |
| Blaze | Framework-free UI toolkit |
Read our verdict in the software roundup.
Explore our comprehensive directory of recommended free and open source software. Our carefully curated collection spans every major software category.This directory is part of our ongoing series of informative articles for Linux enthusiasts. It features hundreds of detailed reviews, along with open source alternatives to proprietary solutions from major corporations such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. You’ll also find interesting projects to try, hardware coverage, free programming books and tutorials, and much more. Discovered a useful open source Linux program that we haven’t covered yet? Let us know by completing this form. |

