 However, other historical states have also used flags without designs or insignia, such as the short-lived Soviet Republic of Hungary and the more recent Sultanate of Muscat and Oman, whose flags were both a plain field of red.Colours are normally described with common names, such as "red", but may be further specified using colourimetry.The largest flag flown from a flagpole worldwide, according to Guinness World Records, is the flag of Mexico flown in Piedras Negras, Mexico.