AndroidSpecialDatesCalendarSpec hardcoded three ARGB literals that its KDoc claimed were 'picked from the shared palette' — a silent-drift hazard, and referencing ui.common from data would invert layering. The palette now lives in data/calendar as CalendarColorPalette with named hues; the swatch pickers use CalendarColorPalette.all and the spec references Purple/Red/Blue. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>