import { ColorThemeData } from './ColorThemeData.js';
import { ColorThemeFactory } from './ColorThemeFactory.js';
export declare class MonochromeThemeFactory extends ColorThemeFactory {
    #private;
    /**
     * Generates a monochrome color theme.
     *
     * @param numberOfColors - The number of colors to include ranging from 2 to 5.
     * @returns An object containing data about the generated color theme.
     * @throws Error if the arguments does not pass the validation.
     */
    getColorTheme(numberOfColors: number): ColorThemeData;
}