My last Ubuntu theme had survived too long, and it was time I changed it. So, my new theme is a Blue theme and here are the specifications on how you can easily get it too.

Wallpaper:

Blue Dock

The wallpaper for this theme  is from Deviantart, and gives a calm and serene look.

Download the wallpaper here : Download Blue Dock

View the Wallpaper Author’s gallery here  : dimage’s gallery

Theme:

Overgloss

Overgloss is the same theme used in Ubuntu Ultimate.

The theme can me downloaded at this location : Download Overglossed Theme

GDM:

Blue Swirl

The Blue Swirl GDM theme adds effect to your Ubuntu Login screen.

The Blue Swirl GDM theme can me downloaded at this location : Download Blue Swirl GDM Theme

Icon Pack:

Blue Icon

The Blue Icon pack is the final step to getting a completely blue look for your Ubuntu installation.
Get the Blue Icon Pack here : Blue Icon pack for Ubuntu