Okay this is one UGLY looking theme but that is by design… try as people might the descriptions in theme’s don’t clearly point to all places a parameter is applied. For me a picture is worth a thousand words so I created this theme you can navigate through to reference where colors are applied. I have noted the color or where it applies next to each parameter. I have not found every parameter available yet but got quite a few. Also this site is a great reference for colors… https://www.colorhexa.com and I use it all the time.
This is so simple, yet I immediately found your post extremely useful.
As a long time theme user, I had long ago resigned myself to simply finding a look that was “good enough” and did not mess with it due to all of the intricate settings. This theme example combined with your re-organized yaml code is a great reference for both newcomers exploring themes and OG’s like me who didn’t feel like deciphering all of the many settings.