Paste is Twilio's open-source design system for building customer-facing UIs in Figma and React, combining foundations, content design guidelines, and components that follow WCAG 2.1 AA and W3C ARIA authoring practices by default.
Design tokens ship in four separate themes (twilio, twilio-dark, default, and evergreen) rather than just a single light/dark pair, and every layer, tokens, primitives, components, compositions, is explicitly composable, so small pieces combine into custom solutions without waiting for a new official component.
Developers building developer-facing communication or API-console products who want accessibility built into every layer by default, not bolted on per component.
It's open source with contributions welcomed on GitHub, so components can be extended or contributed back, not merely consumed passively.
Twilio's design system — composable tokens, primitives, and inclusive design guidance.