import React from 'react';
/**
 * Optional bridge interface to inject theme values from host design system
 */
export interface HostThemeBridge {
    /** Primary text color */
    textPrimary?: string;
    /** Secondary text color */
    textSecondary?: string;
    /** Background color */
    background?: string;
    /** Grid line color */
    grid?: string;
    /** Array of accent colors for data visualization */
    accentPalette?: string[];
    /** Font family */
    fontFamily?: string;
}
/**
 * Chart theme configuration
 */
export interface ChartTheme {
    /** Color values used across charts */
    colors: {
        /** Primary text color */
        textPrimary: string;
        /** Secondary text color */
        textSecondary: string;
        /** Background color */
        background: string;
        /** Grid line color */
        grid: string;
        /** Palette of colors for data series */
        accentPalette: string[];
    };
    /** Font size scale */
    fontSize: {
        xs: number;
        sm: number;
        md: number;
        lg: number;
    };
    /** Border radius for chart elements */
    radius: number;
    /** Font family */
    fontFamily?: string;
}
/**
 * Default categorical series palettes — a fixed hue order, assigned by slot, never cycled.
 *
 * Both sets pass all six palette checks (lightness band, chroma floor, CVD separation,
 * normal-vision floor, 3:1 contrast) against their own surface. The dark set is *selected*
 * for the dark surface rather than reused from the light one: on a dark background the
 * light set put four hues outside the lightness band and dropped `#4a3aa7` to 2.04:1
 * contrast, which is effectively invisible.
 *
 * Same hue order in both, so a series keeps its identity across a theme switch. Re-run the
 * palette validator before changing either — worst adjacent pair is currently ΔE 20.9
 * (light) and 15.1 (dark) under simulated CVD, against a floor of 8.
 */
export declare const DEFAULT_ACCENT_PALETTE_LIGHT: string[];
export declare const DEFAULT_ACCENT_PALETTE_DARK: string[];
/**
 * Provider component for chart theming
 * @param value - Partial theme overrides
 * @param hostThemeBridge - Optional bridge to host design system theme
 * @param children - Child components to render
 */
export declare const ChartThemeProvider: React.FC<{
    value?: Partial<ChartTheme>;
    hostThemeBridge?: HostThemeBridge;
    children: React.ReactNode;
}>;
/**
 * Hook to access the current chart theme
 * @returns Current chart theme configuration
 */
export declare function useChartTheme(): ChartTheme;
/**
 * Convenience hook for host integration (expects a host design system theme object)
 * @param host - Host design system theme object
 * @returns Chart theme derived from host theme
 */
export declare function useHostChartTheme(host: {
    text?: {
        primary?: string;
        secondary?: string;
    };
    backgrounds?: {
        surface?: string;
    };
    colors?: {
        gray?: string[];
        primary?: string[];
    };
} | null | undefined): ChartTheme;