Table 1. Measured and calculated values of CIE color parameters from brown eggs

Parameters	Minimum	Maximum	Mean	SD (standard deviation)	CV (coefficient of variation)
Y*1) (cd/cm2)	7.77	49.01	25.01	9.21	0.37
L*2)	33.49	75.46	55.87	9.41	0.177
a*3)	19.47	49.30	31.74	7.93	0.249
b*4)	46.39	97.95	66.19	10.21	0.162
∆E *5)	71.10	130.51	92.86	12.07	0.131

Y^*, luminance value (0=dark, 100=light).
L^*, egg’s lightness (0=dark, 100=white).
a^*, egg’s color tone as a function of a red-green scale (<0: green, >0: red).
b^*, egg’s color tone as a function of a blue-yellow scale (<0: blue, >0: yellow).
∆E ^*, color difference value (lower number is dark).