Synthetic dye containing the azo group of two nitrogen atoms (NN) connecting aromatic ring compounds. Azo dyes are usually red, brown, or yellow, and make up about half the dyes produced. They are manufactured from aromatic amines.
Red, white, and blue are the pan-Slav colours. The small shields represent Croatia Ancient, Dubrovnik, Dalmatia, Istria, and Slavonia. The flag is based on the tricolour used during World War II. Effective date: 22 December 1990.