The reasoning behind the customisable toggle is for owners to have a way to ensure their chickens with dark colours are readable (i.e. finer customisation of how their chickens are displayed) and any theme that removes the light backgrounds entirely would mean that some chickens will once again blend into the site background when the owner doesn't intend that. A solution that could work while preserving that is to make the light backgrounds darker on dark mode? I'll play around. The "darker light backgrounds" could also be a toggle.