Windows 10 currently has a 'Dark Theme' (not finished) that is hidden and needs a hack to enable it.
www.makeuseof.com/tag/10-dark-windows-themes-skins-reduce-ey...
Computer screens can be glaringly bright, especially in the dark. Try reducing eye strain by using a dark Windows visual style and web browser theme. You can even give every web page you view a white-text-on-black-background look.
www.geeknaut.com/top-free-windows-7-themes-07195358.html
Here we have some of the best windows 7 themes to enhance the look of your windows. These themes will look great on your Windows 7 PC or Laptop.
djabytown.deviantart.com/art/Dark-Agility-Visual-Style-14869...
Dark Agility - the most customized Visual Style for Windows 7 RTM
skinpacks.com/download/windows-7/dark-glass-skinpack/
Transform Windows 10/8/8.1/7 to Dark Glass Size: 24 MB | Version: 2.0 | Update: 8/20/2015
dark-win7-themes.deviantart.com
We are a community that inspires the artist in you. This is a group that appreciates all aspects of art especially the darker side of things.
www.howtogeek.com/222614/how-to-enable-windows-10%E2%80%99s-...
Windows 10’s new default theme is very bright, with lots of white — from window backgrounds to white title bars. Microsoft built a dark, black theme into Windows 10, but it’s hidden.
www.tekrevue.com/tip/windows-10-dark-theme/
Think Windows 10 is too bright? While it's still a work in progress, here's how you can preview the incomplete Windows 10 dark theme right now.
rflfn.deviantart.com/art/U-7imate-Final-Version-for-Windows-...
View U-7imate Final on YouTube Mirror links on my WebSite