You cant easily do this at the moment because of Gnome42’s theme changes.
However the devs have said there will be some green theming re-introduced in the next week or two & towards the end of the year there will be some even better options for choosing your own colours.
It is possible to DIY a solution, but its quite troublesome if you want it across all apps.
Please refer to this post : [Stable Update] 2022-05-13 - Kernels, Mesa, Nvidia, Gnome 42, PipeWire, LIbreOffice, KDE Gear & Frameworks, Virtualbox, Qemu 7.0 - #3 by philm