Implemets the CIEDE2000 color difference algorithm, conversion between RGB and lab color and mapping all colors in palette X to the closest color in palette Y based on the CIEDE2000 difference.
Implemented tests for all examples from Table 1 in
"The CIEDE2000 Color-Difference Formula:
Implementation Notes, Supplementary Test Data, and Mathematical Observations"
Implemented tests for all examples from Table 1 in "The CIEDE2000 Color-Difference Formula: Implementation Notes, Supplementary Test Data, and Mathematical Observations"