import type ApexCharts from 'apexcharts';
/** The theme-bridge output. */
export type ApexChartsTheme = ApexCharts.ApexOptions;
/**
 * Compare fill opacity from the `--chart-compare-fill-opacity` token. Drives
 * the per-series `fill.opacity` of a compare bar / area overlay (see
 * `ChartSeries.role` in `src/components/chart/chart.tsx`). Theme-invariant —
 * the token value itself does not shift between themes; the resulting COLOUR
 * retints because it is mixed from the theme-shifting primary and background
 * (see `resolveCompareTint`). Falls back to 0.18 outside a browser.
 */
export declare function getCompareFillOpacity(): number;
/**
 * Resolve a compare TINT: the paired primary mixed OVER the surface at the
 * compare opacity, so it is an opaque lighter shade of the same hue — used for
 * the legend swatch (and anywhere the tint is needed as a solid colour).
 * `primary` is an already-resolved colour (the k-th primary's colour). Uses the
 * same detached probe the bridge uses for `color-mix`, so it retints per theme
 * with no new observer and no hex literal in component code. Returns `primary`
 * untouched outside a browser.
 */
export declare function resolveCompareTint(primary: string): string;
export declare function getApexChartsTheme(): ApexChartsTheme;
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