People often think of Dark Mode as a choice between a black or white screen, but this feature involves a wide spectrum of both grayscale and color gradients.

It’s an apt metaphor for why we love Dark Mode: human needs unfold across an equally broad spectrum. Whether you want to reduce eye strain, improve battery life, or it just has aesthetic appeal, Dark Mode exemplifies our ability to craft simple and powerful Microsoft 365 experiences that give you choice and flexibility.

Customer choice was why we first brought a darker UI theme to desktop apps in Office 2010, and we’ve brought it to more Microsoft experiences, like Teams, ever since due to its popularity.

A cross-company design collaboration propels us to seamlessly bring Dark Mode to the broader M365 product suite, and today marks the initial rollout of Dark Mode on Outlook for iOS and Android, as well as Office.com! The upcoming launch of iOS 13 will then extend this rollout to Word, Excel, OneNote, PowerPoint, SharePoint, OneDrive, Planner, and To-Do on mobile.

Article source: https://medium.com/microsoft-design/designing-dark-mode-31400530787a