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Open Source Tools

We build tools that millions of developers rely on

We use open source software regularly, and try to contribute back to the projects we use. We also develop a number of our own tools, that might be useful to others.

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OddTools

OddContrast

Color contrast checker with Oklch, Oklab, P3, and more

OddContrast is a color format converter, featuring newer color formats like Oklch, Oklab, and the Display P3 color space. It’s also a color contrast checker to help designers meet WCAG 2 accessibility standards.

HTML & CSS Polyfills

Cascade Layers, CSS Anchor Positioning, Popover

Along with our work for the W3C developing specifications for the CSS language, OddBird has started and maintains a number of powerful polyfills for new web platform features including Cascade Layers, CSS Anchor Positioning, and the Popover attribute.

Cascading Colors

Dynamic & interactive color palettes using CSS

Generate dynamic and interactive color palettes. Define custom themes with CSS custom properties, allow user-adjustments with a bit of light-weight JS, and customize the underlying system with Sass.

Herman

Automated style guides

Design systems streamline development, communication, and consistency – but often rely on dedicated teams and extended budgets. We wanted a tool that helps create and maintain living style guides & pattern libraries in an agile process, and on a budget. Herman helps you keep your development process simple – and your UX consistent – as you scale over time.

Accoutrement

Integrated design-system management in Sass

OddBird’s Accoutrement tools help keep design tokens meaningful to both humans and machines – opening the door for automation, while improving readability. These tools also integrate with Herman, our automated pattern-library generator.

True

Unit-testing for Sass developers

True is the only full-featured unit-testing framework designed specifically for the Sass language. Write your tests in Sass, compile them with Sass, and then (optionally) pass the results to a Javascript test-runner for command-line control and reporting.

Blend

Sass support for LCH, Lab, and more CSS color spaces

Core Team

W3C CSS Working Group

Developing specifications for the CSS language

Miriam is an Invited Expert on the W3C CSS Working Group, helping to develop the next level of Cascading & Inheritance, in addition to other CSS standards. She’s also active in the CSS4 and Design Token Community Groups.

Sass

CSS with superpowers

Sass is the most mature, stable, and powerful professional grade CSS extension language in the world. After creating several of the most popular sass toolkits, Miriam became a core contributor to the language.

Other Contributions

Open Source Sponsors

Current Sponsors

A huge thank you to the individuals and organizations sponsoring OddBird’s open source work!

Open Collective Avatar for Outline GbROpen Collective Avatar for basherOpen Collective Avatar for Mat MarquisOpen Collective Avatar for HiddeOpen Collective Avatar for Paul van BuurenOpen Collective Avatar for JohannesOpen Collective Avatar for William KillerudOpen Collective Avatar for Nikita Dubko

Sponsor OddBird’s OSS Work

We love contributing back to the languages & tools that developers rely on, from CSS & Sass to browser polyfills and Python. Help us keep that work sustainable and focused on developer needs!