Quarantine "yellow jack" but this was also a name for yellow fever, which probably derives its common name from the flag, not the color of the victims (cholera ships also used a yellow flag). The plain yellow flag ("Quebec" or Q in international maritime signal flags) probably derives its letter symbol for its initial use in "quarantine", but this flag in modern times indicates the opposite—a ship that declares itself free of quarantinable disease, and requests boarding and routine port inspection. Australia has perhaps the world's strictest quarantine standards. Quarantine in northern Australia is important because of its proximity to South-east
Flag of Norway Norwegian government's web pages. However, Norwegian flag producers consider this red colour to be incorrect, and have complained that the Norwegian state propagates what they perceive as misinformation. Norwegian authorities have clarified that the red colour is only an internal recommendation intended specifically for screen printing, and not a legal definition. Flag producers normally use the red colours 186 or 200. The Nordic Council currently defines the red colour as "Pantone 186 C" and the blue as "Pantone 287", according to the Nordic Flag Society Four years ago the same website mentioned the blue colour as "Pantone 301". On page