/**
 * Data-visualisation colour tokens.
 *
 * Dark and light are independently *selected*, not flipped: a light palette is
 * not a dark palette inverted, because contrast against the surface runs the
 * opposite direction. Every value here is verified by `chart.validate.test.ts`.
 *
 * The categorical ramp keeps the hue identity of `tokens.colors.inventory` for
 * six of seven slots. The seventh replaces the pale sage `#C3D7A4`, which reads
 * grey (chroma 0.072) and collapses into the green once brought into the
 * lightness band.
 */
export type ChartMode = 'dark' | 'light';
export type ChartMedia = 'screen' | 'export';
/** Slots are assigned in fixed order and never cycled. */
export declare const SERIES_SLOT_COUNT = 7;
/**
 * All-pairs separation is a strictly harder test than adjacent, and it binds a
 * series cap rather than a palette change — no ordering of seven hues can clear
 * it. Chart forms where any two marks can be neighbours (scatter, bubble, small
 * multiples) must not exceed this many series.
 */
export declare const ALL_PAIRS_SERIES_CAP = 3;
export interface ChartInk {
    /** Plot gridlines. Recessive. */
    grid: string;
    /** Axis lines and ticks. */
    axis: string;
    /** Axis and legend text. */
    label: string;
    tooltipBg: string;
    tooltipBorder: string;
    tooltipText: string;
    /** Fill opacity for area marks. */
    areaOpacity: number;
}
export interface ChartDiverging {
    negative: readonly string[];
    midpoint: string;
    positive: readonly string[];
}
export interface ChartTokenSet {
    surface: string;
    series: readonly string[];
    sequential: readonly string[];
    diverging: ChartDiverging;
    ink: ChartInk;
}
export declare const chartTokens: Record<ChartMode, ChartTokenSet>;