Yep, there has been a Dark theme in the To-Do app for a while now, so if you have not noticed before, we will tell you how to enable it and what it persists of. It has been improved in version 1.43.7617, released for beta users and here is the changelog for it:
We’ve continued to polish Dark theme support in our widget. With this update, we’ve added rounded corners and checkbox colors.
This update also includes accessibility improvements with several fixes for TalkBack support.
We’ve continued to improve performance with several crash fixes.
To switch it on, open the app, tap on the hamburger menu key on the left, touch the profile avatar image to enter the settings and select Theme. Enabling it changes the primary background color to #1F2428, which is similar to Google's Material Blue Grey 900. The primary text color is white, while the secondary one is a variant of grey. The accent color stays the same as in the Light theme - #3C4989 - indigo. Nothing creative to be found though.
Looks like Microsoft has added adaptive icons support for those who are a fan of it, and it is works on devices running Android 7.1 Nougat and above, plus with many third-party launchers such as Nova Launcher and Lawnchair on older versions of Android too.
To be honest, this theme looks very pleasing to the eye, but where is the "Black theme" for black lovers like me?