Design Systems & Design Tokens W3C Design Token Specification (v1.0 — October 2025) The W3C Design Tokens Community Group spec defines a vendor-neutral JSON format for sharing design decisions across tools (Figma, Sketch, Style Dictionary, Tokens Studio). Token structure Token hierarchy (3 layers) Rule : Components consume semantic tokens, never primitives directly. This enables theming by swapping the semantic layer. --- shadcn/ui CSS Variable Convention shadcn uses HSL values without the wrapper, enabling opacity modifiers ( ): Usage in Tailwind: , , , . --- Theme Switching Implementation S…