Howtosignalprocessing
How do you measure color distance?
In order to measure the difference between two colors, the difference is assigned to a distance within the color space. In an equidistant-method color space, the color difference ∆E can be determined from the distance between the color places: ΔE = √ (L*₁-L*₂)² + (a*₁-a*₂)² + (b*₁-b*₂)².
What does distance mean in color?
In color science, color difference or color distance is the separation between two colors. This metric allows quantified examination of a notion that formerly could only be described with adjectives. Quantification of these properties is of great importance to those whose work is color-critical.
How do you compare colors?
The most common method would be a visual color comparison by looking at two physical color samples side by side under a light source. Color is very relative, so you can compare colors in terms of the other color across dimensions such as hue, lightness and saturation (brightness).
