import type { ColorRuleProps } from '../../../core/types/color-rule.js';
import type { HistogramSeries } from '../../../histogram/types/histogram.js';
export declare const HISTOGRAM_DEFAULT_VALUE_ACCESSOR = "name";
/**
 * Extracts the subject value from a HistogramSeries for color rule matching,
 * replicating the histogram's strategy.getSubject behavior.
 *
 * When no valueAccessor is provided (or when it equals "name"),
 * the subject defaults to the series name.
 */
export declare function getSubjectForSeries(rule: ColorRuleProps, series: HistogramSeries): unknown;
//# sourceMappingURL=get-subject-for-series.d.ts.map