Duet is the design system for Finnish insurer LocalTapiola and Turva, a modular set of front-end packages (Basic HTML, Angular, React) plus a Sketch toolkit, built around WCAG 2.1 accessibility and genuine performance discipline.
The entire component runtime, token system, and CSS framework together weigh just 5.8 KB, a concrete, unusually specific performance number worth citing when arguing for a lightweight system over a heavier framework.
Developers who need genuinely lightweight, framework-flexible components (works across plain HTML, Angular, or React) without pulling in a large runtime.
It's divided into six separate front-end packages usable independently, so a project can adopt just the tokens or just the CSS framework without the full component set.
A shared UI framework for LocalTapiola and Turva's digital products, with theming guidelines.
