Could you please post the code that produces this output?
First obtain the data from
and eliminate duplicate colors. Then loop through the distance measures built-in for ColorDistance:
For each of these, check the four properties listed in the table above (see https://mathworld.wolfram.com/Metric.html and distance[a,b] > 0 for all a != b), collecting pertinent information.
Afterwards, summarize the results in a Table, using Histogram to produce the charts in the last row.