Darko 3 is an icon pack. It is not a stand alone application you need a third party launcher to apply it.

Darko 3: A dark set with shadow for depth. Use it with any dark wallpaper for better depth effect.

What's included:

? 4.990 HD icons (256x256)
? Matching HD cloud wallpapers!
? Launchers support: Action Adw AdwEX Apex Atom Aviate GO NextNova Smart Solo...
? Icon masking for un-themed icons
? Dynamic calendar (For Nova Launcher)
? Alternative icons to choose
? Updates.