Default series palette — 8 hues each verified at >= 3:1 non-text contrast (WCAG 1.4.11)
against BOTH a white (#ffffff) and a dark (#0c1016 / #1f2937) chart background, so the marks
are distinguishable on either theme without the integrator choosing colors. Assigned by
series index when SeriesConfig.color is omitted. (Color alone is never the sole channel —
see the per-series dash/marker option.)
Default series palette — 8 hues each verified at >= 3:1 non-text contrast (WCAG 1.4.11) against BOTH a white (#ffffff) and a dark (#0c1016 / #1f2937) chart background, so the marks are distinguishable on either theme without the integrator choosing colors. Assigned by series index when
SeriesConfig.coloris omitted. (Color alone is never the sole channel — see the per-series dash/marker option.)