Install Fusion Dark GTK3 + Gnome Shell Theme on Ubuntu 12.04 Precise/Linux Mint 13 Maya

Fusion is dark theme some people really like dark theme, it is available for Gnome Shell 3.4 and GTK 3. It shows white windows border in unity environment but still looks cool.
You can use these Tools to change theme and icons: Gnome Tweak ToolUbuntu Tweak
Checkout theme collection here.

1st Install Awoken Icons

ubuntu themes

dark themes

To install Fusion theme on Ubuntu/Linux Mint (GTK +Gnome Shell) open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:
That's it
Source: Fusion
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