plinth_core

Design tokens and theme foundation for Plinth UI — colors, spacing, radius, and typography scales that every Plinth component reads from.

This package is the theme layer only. For the actual widgets (buttons, inputs, cards, and 114 others), see plinth_components.

Usage

Register PlinthTheme once, at your app root:

MaterialApp(
  theme: ThemeData(
    useMaterial3: true,
    extensions: [PlinthTheme.defaultTheme],
  ),
)

Every Plinth widget reads its colors, spacing, and radius from this theme via context.plinth — a single palette swap restyles the whole app. PlinthTheme generates a full 10-shade ramp from a single base color per palette entry, using non-linear lightness stops and shade-dependent saturation rather than plain linear interpolation, so light shades read as soft tints and dark shades stay rich rather than just fading to gray.

What's in this package

• PlinthTheme — the ThemeExtension<PlinthTheme> holding color palettes, spacing, radius, and font-size scales.
• PlinthSize (xs–xl) and PlinthVariant (filled, light, outline, subtle, transparent, defaultVariant) — shared tokens used consistently across every Plinth component.
• context.plinth — convenience extension for accessing the active theme from any BuildContext.

See the full documentation for the complete component reference and a live example app.