/**
 * Converts RGB color values to their hexadecimal representation.
 *
 * @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).
 * @returns A string representing the hexadecimal color value in the format "#RRGGBB".
 */
declare function rgbToHex(r: number, g: number, b: number): Promise<string>;
export { rgbToHex };