High Quality Content by WIKIPEDIA articles! Safety orange (also known as blaze orange, vivid orange, Caltrans orange, or Omaha orange) is a hue. Its deeper, more saturated shade is known as international orange. 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 high-visibility clothing to be worn while hunting.