DrylChartPalette

Optional overrides for DRYL's categorical chart series palette (<c>--chart-1</c> … <c>--chart-6</c>). Any slot left <c>null</c> keeps the derived/default color for that token: slots 1 and 2 follow the theme's accent seeds (hue from the accent, lightness/chroma normalized into the dark-validated band), slots 3–6 are fixed anchors.