Last year, Microsoft rolled out a temporary dark theme for Outlook on Halloween (pictured above), it turns out that dark theme was something more than a one-off gag. Microsoft has apparently been testing a dark theme for Outlook's web app internally over the past few months and now the firm is getting ready to roll it out to users soon.
On UserVoice, Microsoft's Outlook.com advocate explained:
"One reason for the delay is our insistence that we deliver the best Dark Mode of any leading email client (you’ll understand when you see it, I guarantee). The sneak preview you saw last year at Halloween was a prototype that required a lot more work to be ready for prime time. We’ve redesigned the colors and code multiple times and are proud to enter the final stretch. Like you, we eagerly await the day this is finally available to the public. I am elated to announce that that day is very soon."
A dark theme is one of the most common user requests whether it comes to individual apps or an entire operating system. Apple has just implemented a system-wide dark theme in macOS 10.14 Mojave, and Google has recently added a dark theme toggle in Android P's beta for users.
Microsoft's dark theme for Outlook users will likely roll out first for Beta users, and then generally over the coming months.