Here is a small demo I put together based on a database of 250 skin colours, in the form of two videos. I used the CIELAB values and rendered each as an sRGB image tile. When I first looked at the set, they seemed to be arranged with small colour differences between each. When I randomized the order, things looked different. Same data (although, I did not ensure that each sample was selected only once for the random selection).
Harmony: Demo 1 in which order from the data set is preserved here
Diversity: Demo 2 in which order is randomised. Different impression? here
The data is available from Spectromatch (NO LONGER POSTED, contact Peter Burns for information)