deltaE_ciede2000(lab1, lab2, kL=1, kC=1, kH=1)
CIEDE 2000 is a major revision of CIDE94. The perceptual calibration is largely based on experience with automotive paint on smooth surfaces.
CIEDE 2000 assumes parametric weighting factors for the lightness, chroma, and hue (:None:None:`kL`, :None:None:`kC`, :None:None:`kH` respectively). These default to 1.
reference color (Lab colorspace)
comparison color (Lab colorspace)
lightness scale factor, 1 for "acceptably close"; 2 for "imperceptible" see deltaE_cmc
chroma scale factor, usually 1
hue scale factor, usually 1
The distance between :None:None:`lab1` and :None:None:`lab2`
Color difference as given by the CIEDE 2000 standard.
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