Safety orange is a hue. Safety orange is used to set objects apart from their surroundings, particularly in complementary contrast to the azurecolor of the sky. 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. ANSI standard Z535.1–1998 states how safety orange is defined in the following notation systems:
Note that this CIE color point is outside the gamut of common color spaces like sRGB or Adobe RGB. The closest CIE color point that is still in the sRGB gamut is x = 0.54091, y = 0.40869, Y% = 30.05, corresponding to the sRGB-255 coordinates. The Adobe RGB color space is larger than the sRGB color space; the closest "safety orange" CIE color point that is still in the Adobe RGB gamut is x = 0.54467, y = 0.41424, Y% = 30.05, corresponding to the AdobeRGB-255 coordinates. Safety orange is the color usually used in the United States for traffic cones, stanchions, barrels, and other construction zone marking devices. OSHA requires that certain construction equipment must be painted safety orange. Two large trucking companies, Allied Van Lines and Schneider National, paint their trucks and trailers safety orange. In Europe, Dayglo orange serves the same purpose. Safety orange is the same color as blaze orange, the shade of orange required by United States law to be on the tips of barrels of replica guns such as airsoft guns, and cap or toy guns. Hunter orange is also the color of hats, caps, and other safety wear required to be worn while hunting in most US states.
Elsewhere
Orange vests using colors such as safety orange as high visibility clothing may be commonly worn by workers in the US, but this is not merely a legal standard but can be influenced by culture. Since such colored patterned gear is easily produced, it can be assigned any kind of meaning. In Indonesia, it is commonly worn by parking attendants. Similarly in Thailand, it is used by motorcycle taxi workers.
