I did an analysis of the current 'notheme' approach. I think the approach is solid and does not need substantial revision. However, in light of recent changes to the structure of the CSS and themes, I was able to make some augmentations to the existing approach that I think will be valuable to the mobile team as well as the editors of the articles.

In the transition to using LESS and the Wikimedia Base UI library, most colors in-use in the application were able to be translated directly to existing variables. A couple were not directly translated, and were instead changed to similar existing variables rather than maintain one-off colors. Here is that list: