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Color difference meter manufacturers tell you CIELAB color space
In the past, numerous color difference formulas caused significant challenges in industrial applications. This was due to the fact that data from painless color difference formulas could not be easily or accurately converted between each other, and results calculated using different formulas often conflicted. To address this confusion and establish a consistent standard for color difference evaluation, the International Commission on Illumination (CIE) introduced the CIELAB uniform color space along with its corresponding color difference formula in 1976. This development aimed to bring clarity and consistency to color measurement across industries.
The CIELAB color space is a three-dimensional system that represents colors based on three components: L (lightness), a (red-green axis), and b (yellow-blue axis). The right figure illustrates the three-dimensional distribution of colors within this space. Since its introduction, the CIELAB color space has become widely adopted in various industries, particularly in dye and pigment manufacturing, coatings, textile printing, ink production, and plastic coloring.
The a-b plane in the CIELAB model represents the chromaticity of a color. On this plane, +a indicates red tones, while -a represents green tones. Similarly, +b corresponds to yellow, and -b corresponds to blue. The L value reflects the lightness of the color, ranging from 0 (black) to 100 (white). This system allows for more accurate and perceptually uniform color comparisons than earlier models.
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