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L* = 116 (Y / Yn)1/3 - 16    where Y/Yn > 0.008856
L* = 903.3 (Y / Yn)             where Y / Yn < ¨® = 0.008856
a* = 500 [ f(X / Xn) - f(Y / Yn) ]
b* = 200 [f(Y / Yn) - f(Z / Zn) ]
f(X / Xn) = (X / Xn)1/3                             where (X / Xn) > 0.008856
f(X / Xn) = 7.787 (X / Xn) + 16 / 166       where (X / Xn) < ¨® = 0.008856
f(Y / Yn) = (Y / Yn)1/3 where (Y / Yn ) > 0.008856
f(Y / Yn) = 7.787 (Y / Yn ) + 16 / 116      where (Y / Yn ) < ¨® = 0.008856
f(Z / Zn) = (Z / Zn)1/3 where (Z / Zn) > 0.008856
f(Z / Zn) = 7.787 (Z / Zn) + 16 / 116       where (Z / Zn) < ¨® = 0.008856

Xn = 94.825; Yn = 100; Zn = 107.381

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X = 12.31; Y = 60.03 and Z = 10.24
L* = 29.2
a* = 55.08
b* = 36.10
C* = 66.00
H* = 33.26º

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