Token-Driven Theming for Light and Dark Modes

Theme quality depends on structure, not on random color overrides. Token-driven systems keep components stable across light and dark contexts.

Token hierarchy

• Base tokens: raw palette values
• Semantic tokens: surface, text, border, accent
• Component tokens: button-bg, card-border, etc.

Why semantic layer matters

When semantics are clear, theme swaps do not require rewriting component CSS.

Contrast planning

Check critical pairs first:

• Body text vs background
• Secondary text vs surface
• Interactive states

Rollout model

Start from global surfaces and typography, then migrate components by priority.

Long-term gain

Token systems reduce visual bugs, speed up brand refreshes, and keep large interfaces coherent.