import React from 'react';
export interface HeatmapLegendProps {
    /** Base color key from chart config (e.g., 'value', 'activity') */
    colorKey?: string;
    /** Color to use for the gradient */
    color?: string;
    /** Minimum value for the legend */
    minValue?: number;
    /** Maximum value for the legend */
    maxValue?: number;
    /** Custom labels for min and max */
    labels?: {
        min?: string;
        max?: string;
    };
    /** Additional CSS classes */
    className?: string;
}
export declare const HeatmapLegend: React.FC<HeatmapLegendProps>;
