Hi guys, thanks for the input.
Surely, everything is possible with themes and colors, whichever effort it takes, there are no limits.
But in my opinion this is not constructively having any advantage for the purpose of this software. Play around with Windows themes for all software on your pc to have the same effect; all used colors depend on it, they are in no way completely fixed.
As a personal note, I don't like dark modes and such, so this is my 'signature' for all of my software :]
Cheers and have a happy new year coming up or being already paste that.