CalDAV sync adapters (DAVx5) publish all ~147 CSS3 named colours into
CalendarContract.Colors, so the picker showed a full screen of
alphabetically-scrambled, partly duplicated swatches. Palettes are now
deduped by value, thinned to perceptually distinct colours (CIE76
deltaE >= 25 in Lab) when oversized, and sorted around the hue wheel
with achromatics last. Small palettes (Google's curated set) pass
through untouched, and every surviving swatch keeps its provider
colour key so picks still round-trip through sync.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Jean-Luc Makiola
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