Hi,
I'm not sure I'd agree that this is the solution to an accessibility
issue. For example, dark mode also has far lower contrast, people that
need high contrast might request exactly the opposite change.
In the end, I think which theme should be used is a very personal
decision that should be taken by the end user depending on their
circumstances and environment. If the first password entry is difficult,
the user can switch to dark mode using the toggle in the top left
corner. This toggle not working would absolutely be a bug if you have
tried it.
Finally, we almost exactly ship the upstream config. Should upstream
change the default we'd follow suit.
Thanks.