import type { string_color } from '../../types/string_person_fullname';
/**
 * Checks if the given value is a valid hex color string
 *
 * @param value - value to check
 * @returns true if the value is a valid hex color string (e.g., `#009edd`, `#fff`, etc.)
 *
 * @private function of Color
 */
export declare function isHexColorString(value: unknown): value is string_color;