I'm working on a tool that easily allows you to theme your UI using CSS variables called Blueberry. https://www.getblueberry.io/
The idea is that each CSS variable becomes a widget and then the Blueberry endpoint will serve those variables so you can let your users customize profile pages/portals and other places they integrate with you UI.
The idea is that each CSS variable becomes a widget and then the Blueberry endpoint will serve those variables so you can let your users customize profile pages/portals and other places they integrate with you UI.