https://www.bleepingcomputer.com/news/microsoft/microsoft-added-a-dark-theme-in-new-windows-10-to-do-update/

Microsoft has been been making strides in getting a Dark Theme added to their popular apps and to finally getting it added to Windows components that do not have one yet, such as File Explorer.

Today, Microsoft officially released a new Dark Theme for their popular To-Do app for Windows 10 in the Microsoft Store. This update brings the To-Do app to version 1.34.1806.27001.