spectrum

Package preferences persists the user-selected theme name and accessibility overrides to an OS-appropriate config directory and emits the loaded values on app launch.

Package system bridges OS-level appearance signals (dark mode, accent colour) into the reactive theme runtime.

Package transition provides theme-token-specific colour interpolation helpers built on github.com/vibrantgio/pulse/tween.

Package window pairs an mvu.Window with the rx.Observable[theme.Theme] that drives its rendering.