The hexadecimal RGB code of Rich Black (FOGRA39) color is #010203. This code is composed of a hexadecimal 01 red (1/256), a 02 green (2/256) and a 03 blue component (3/256). The decimal RGB color code is rgb(1,2,3).
Lviv Polski. Vol. II. Dzieje Polski Piastowskiej: VIII w. - 1370 (in Polish). FOGRA. p. 327. ISBN 83-85719-38-5. Barański, Marek Kazimierz (2006). Dynastia
History of Poland (1939–1945) the World, vol. 11: Great Wars of the 20th century (1914–1945)]. Kraków: Fogra. ISBN 83-60657-00-9, p. 409 Zgórniak, Marian; Łaptos, Józef; Solarz, Jacek
Stone-Age Poland polskich (do VII w.) (Oldest history of Polish lands (until the 7th century)), Fogra, Kraków 1998, ISBN 83-85719-34-2, p. 55-58 Kalendarium dziejów Polski (Chronology