I wish we had the option to retain the ‘focused’ color shown for lists under Navigation and under Mail Items (Search box just above) – even when focus is lost.
Regardless of which theme I choose, my old eyes have to strain to discern which Folder I’m currently on as selected Items revert to a low contrast color (when focus is lost) that blends in with nearby items. If these controls could be made to show the same color (focused or not), I believe Navigation would be more intuitive and attractive with little impact on existing themes.
best regards,