Anyone here using Penumbra? https://github.com/nealmckee/penumbra > »Penumbra is a mathematically balanced colour scheme constructed in a perceptually uniform colour space with base colours inspired by the shades of colour occurring in nature due to the light of the sun and the sky. It cleanly separates the perceptual properties of colours while optimally utilizing the available colour space of typical displays.« It…
The nasty details in color space is basically that it is a non-Euclidean metric (when considering perceptual uniformity). There are empirical formula describing a metric. And one can probably numerically optimize in that metric. But it doesn't seem to do something like that (I skimmed through only.)