[solasluaith]

Many differences to my attempt: Luminance is kept different between colours according to some subjective “individuality”, I touched on why I decided against this in another comment. This has rippling effects as instead of being able to just make chroma uniform, one now needs to subjectively adjust both in tandem to get the same apparent brightness, which will never be as precise as doing it mathematically (which would require a full colour appearance model like CIECAM16). But then, luminance and chroma are still different across colours, so this still appear somewhat uneven. Compare the colour swatches here https://codepen.io/rguiscard/full/OJvZLpd to those of Selenized and you should see the difference. Same things goes for the choice of hues, they’re further apart on what appears to be an HSL-based colour wheel, but by no means optimally spaced (at least there’s no mention of it). Plus for all of this they used CIELab which simply isn’t as perceptually uniform as it claims to be, especially with respect to hue, so optimal spacing wouldn’t have even been possible.

It definitely improves on some of the same issues I had with Solarized, but in a non-rigorous way, with more of a “good enough” approach.