/**
 * Adjusts the brightness of an RGB color by a specified amount.
 *
 * @param r - The red component of the color (0-255).
 * @param g - The green component of the color (0-255).
 * @param b - The blue component of the color (0-255).
 * @param adjustment - The amount to adjust the brightness by (can be positive or negative).
 * @returns An array containing the adjusted RGB values.
 */
declare function adjustBrightness(r: number, g: number, b: number, adjustment: number): Promise<number[]>;
export { adjustBrightness };