Case study

Helsinki Design System

Public sector design system work with accessibility rigor and multi-team governance.

design systemsPublic sectorA11yReact/TS

Estimated reading time

Key metrics

WCAG AA compliance

up from ~65%

98%

Departments using HDS

city-wide adoption

12+

Service launch time

down from 3 months

6 weeks

Outcome

Three signals of impact.

Raised WCAG AA compliance from ~65% to 98% across city digital services
Shared components adopted by 12+ city departments, eliminating ~40% of duplicated UI work
Cut new service launch time from 3 months to 6 weeks with pre-built accessible patterns

Role and scope

Component design, accessibility, documentation, animation

Constraints

Top decisions

Confidential details redacted where required.

Next step

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