718 voteslegato commented
There is another competing idea that identical to this one... https://outlook.uservoice.com/forums/322590-outlook-2016-for-windows/suggestions/16263109-black-theme-should-make-reading-edit-pane-dark-too
Thank you for submitting feedback! We value your feedback and are actively working on this item.legato commented
To work around the stark white reading pane I have turned it off and changed message preview to show 3 lines. For longer messages I still have to open them but at least it's easier on the eyes for the majority of my email reading.
This would be a great feature to add. Hopefully the dark reading pane can be implemented soon.