Outlook Dark Contrasted is a simple dark style for Outlook.com.
This is a based in the original Style "Outlook.com Tidy" by BoffinBrain, which can be accessed here: Outlook.com Tidy Official Repo.
The actual status is just the change of some dark colors to the high contrasted Dark #000000
This will be improved for other layout "areas", in future versions. Fell free to contribute.
Install Stylus for either Firefox, Chrome/Chromium/Brave/Vivaldi or Opera or Cascadea for Safari and then:
Install the usercss which supports automatic updates.