import type { RGBColour } from "./types";
/**
 * Finds the nearest RGB colour in a palette to the given RGB colour.
 *
 * @param {RGBColour} colour - The RGB colour to find the nearest match for.
 * @param {RGBColour[]} palette - An array of RGB colours to search for the nearest match in.
 * @returns {RGBColour} The RGB colour in the palette that is closest to the given colour.
 * If the palette has fewer than 2 colours, or if it is undefined or null, the original colour is returned.
 */
export declare function findNearestRGBColour(colour: RGBColour, palette: RGBColour[]): RGBColour;