three-dimensional, approximately uniform colour space produced by plotting in rectangular coordinates L* u* v* quantities defined by the equations
Y, u′, v′ describe the colour stimulus considered and Yn, u′n, v′n describe a specified white achromatic stimulus
NOTE – Approximate correlates of lightness, saturation, chroma, and hue may be calculated as follows:
CIE 1976 lightness: L* = 116 (Y/Yn)1/3 − 16 where Y/Yn > 0,008 856
CIE 1976 u, v saturation: suv = 13 [(u′ − u′n)2 + (v′ − v′n)2]1/2
CIE 1976 u, v chroma: C*u, v = (u*2 + v*2)1/2 = L*suv
CIE 1976 u, v hue-angle: hu, v = arctan [(v′ − v′n)/(u′ − u′n)] = arctan (v*/u*)
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