Created attachment 154002 [details]
Oxygen + Breeze
The Breeze icon for Night Colour could be better. It isn't very clear what it is; it looks mostly like an exclamation mark, and even a bit like a footprint.
I've attached screenshot of the Breeze one & an Oxygen one. The Oxygen one is very clear what it is, it is more obviously a lightbulb & it is red and has a moon behind it, which makes it very clear to me that it is for Night Colour / Redshift.
The space at the sides of the Breeze icon are also greater than most other icons, which makes it look slightly separate, but this could allow elements to be added to it to make it clearer or more bulb-like.
Operating System: Debian GNU/Linux 11
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Kernel Version: 5.10.0-19-amd64
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-4570 CPU @ 3.20GHz
Memory: 7.7 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 750 Ti/PCIe/SSE2
Created attachment 154003 [details]
Rough pixel drawn icon ideas
I played around in GIMP & created a few pixel-drawn mock-ups of an Breeze-type icon that is a bit like the Oxygen one. I took the red from the Updates icon & created a moon too.