import chroma from 'chroma-js';
export declare class ColorMatrix {
    readonly log: {
        info(message: string, ...data: unknown[]): void;
        warn(message: string, ...data: unknown[]): void;
        error(message: string, ...data: unknown[]): void;
        debug: {
            info(message: string, ...data: unknown[]): void;
            warn(message: string, ...data: unknown[]): void;
            error(message: string, ...data: unknown[]): void;
        };
    };
    private _matrix;
    /**
     * The color matrix represents the colors of the DataTableList etc.
     * One-to-one correspondence between colors and chart element or group.
     */
    get matrix(): string[][];
    constructor(matrix: string[][]);
    /**
     * Get one color from color matrix.
     * @remark
     * If the coordinates are outside the range of the matrix, the colors will be cycled.
     * @param row
     * The row index of colors representing the `dimension`.
     * @param column
     * The column index of color representing the `category`.
     * @returns
     * The color corresponding to the data element.
     */
    get(row: number, column: number): string;
    /**
     * Narrow the gap between colors for aesthetics.
     * @param maxDistance
     * The color distance of specific color space.
     * @param colorSpace
     * The color represent method such as `rgb` or `hsl`.
     */
    nice(maxDistance?: number, colorSpace?: Keys<chroma.ColorSpaces>): void;
}