import type { NamedCSSColour, RGBColour } from "./types";
/**
 * Converts an RGB colour object to a named CSS colour.
 *
 * @param {RGBColour} colour - The RGB colour object to convert.
 * @returns {NamedCSSColour | undefined} The named CSS colour that corresponds to the given RGB colour, or undefined if no named CSS colour matches the given colour.
 */
export declare function convertRGBtoNamedCSSColour(colour: RGBColour): NamedCSSColour | undefined;