Not what you asked (Plasma theme), but my favorite UI theme since always has been MacOS Drawingboard:
https://www.appimagehub.com/p/1219916
Wishing it was possible on Linux for +20 years..
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
Not what you asked (Plasma theme), but my favorite UI theme since always has been MacOS Drawingboard:
https://www.appimagehub.com/p/1219916
Wishing it was possible on Linux for +20 years..
If you add an "!" Before the image link it is displayed in line!
I use a Medium theme on my desktop. It's not dark or light. It really works for me.
I found it here, https://github.com/blue-mood/blue-mood-kde-color-scheme
I was actually looking for a Med-Dark charcoal theme and decided to try this first. I've used it for years now.
I tried making a KDE theme too and it either looks like that, or random parts are colored differently.
But everything blue... haha no thanks
I might consider using a light theme if I had a nicer monitor and a clean desk.