safety orange (also known as blaze orange, vivid orange, osha orange, hunter orange, or caltrans orange) is a hue. safety orange is used to set objects apart from their surroundings, particularly in complementary contrast to the azure color of the sky (azure is the complementary color of orange, and therefore there is a very strong contrast between the two colors). the color is commonly used for hunting during the rifle season, and is also used for quail hunting. most places, such as construction sites, use safety orange to help ensure the safety of others.