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CIE LAB and delta E color difference

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Related Knowledge about Colorimeter Spectrophotometer:Color SpaceCIE LAB-L(Lightness)-0 is black,100 is white-a(Red-Green)-positive values are red; negative values are green and 0 is neutral-b(Blue-Yellow)-positive values are yellow;negative values
Related Knowledge about Colorimeter & Spectrophotometer:

Color Space


CIE LAB
-L(Lightness)-0 is black,100 is white
-a(Red-Green)-positive values are red; negative values are green and 0 is neutral
-b(Blue-Yellow)-positive values are yellow;negative values are blue abd 0 is neutral

CIE LCH
L: Lightness,value is the same in each scale C:Chroma H:Hue Angle

dE Total Color difference
Delta-E is a measurement used to indicate how much a color deviates from an accepted standards.The higher the dE, the more inaccurate the color.

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Delta E
Meaning
0~1
A normally invisible difference
1~2
Very small difference, only obvious to a trained eye
2~3.5
Medium difference, also obvious to an untrained eye
3.5~5
An obvious difference
>6
A very obvious difference
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