Light series themes to go with dark Gray8 Color Pack.
You can use it with any of this icon packs Windows 8 Icon Packs.
Gray8 Light Series Windows 8 Visual Style has 4 colors-gray,blue orange and purple.
There is also a bonus high contrast version of the blue theme
This will pretty much theme everything to gray & black with blue highlights.
Instructions, previews,etc are included in the download.
If you wanna modify your Windows Explorer’s borders, you can use Tiny Windows Borders for Windows 8.