Safety orange is a hue used to set objects apart from their surroundings, particularly in complementary contrast to the azure color of the sky. The high-visibility color is commonly used in hunting contexts and for construction site safety.
ANSI standard Z535.1–1998 states how safety orange is defined in the following notation systems:
Munsell notation
5.0YR 6.0/15
Approximate PMS Color
13 parts yellow, 3 parts warm red, 1⁄4 part black
Pantone number
151c
CIE Data
x = 0.5510 y = 0.4214 Y% = 30.05
Note that this CIE color point is outside the gamut of common color spaces like sRGB or Adobe RGB. From Wikipedia
