I've been building something similar[1], but focused more on generating desktop/mobile wallpapers based on a desktop theme.

Most of the designs is build via python-scripts that generate the final SVG's which then can be recolored in browser. Claude + a harness is surprisingly adept at generating these scripts, i guess pelicanmaxxing might be the reason?

[1] https://github.com/nickolaj-jepsen/walldye