A 19-year-old Emirati from Abu Dhabi, Abdullah Mohammed Al Maainah, designed the UAE flag in 1971. The four colours of the flag are the Pan-Arab colours of red, green, white, and black, and represent the unity of the Arab nations. It was adopted on 2 December 1971. Al Maainah went on to serve as the UAE ambassador to Chile and currently serves as the UAE ambassador to the Czech Republic.