The NSW Design System is the toolkit for New South Wales government digital products, with a Figma kit of 30+ responsive components, HTML/React code available via npm or CDN, and features marked with a blue diamond when required for brand compliance.
Its built-in theming framework explicitly supports masterbrand, co-brand, and independent classification levels at once, a concrete answer for any project that needs one system to serve a primary brand and several sub-brands without forking the whole system.
GovTech designers needing multi-brand theming (a primary department plus co-branded partner agencies) solved within one shared component set.
Compliance-required components are visually flagged with a blue diamond marker in the docs, worth checking directly before assuming a component is optional versus mandated.
The NSW Government's design system, with components built for accessibility.