Helsinki Design System (HDS) is the City of Helsinki's open-source design system, providing accessible components as both React and plain CSS, plus patterns for building coherent digital city services.
Every component goes through a third-party accessibility audit before release, not merely an internal checklist, a level of independent verification most public design systems don't claim.
GovTech and civic-service designers wanting an accessible, independently audited component set that offers both React and framework-free CSS options.
It's fully open source on GitHub, so components can be installed directly, and the Core CSS package alone brings Helsinki's brand colors and typography into a project without adopting React.
Helsinki's open-source design system for consistent city digital services.
