This is a blue variation on SlicknesS-black. The wallpaper in the background is "Quiet Night" (not part of the theme metafile), and the icon theme I recommend with this theme is GNOME-Brave, which is, of course, part of the GNOME-Colors series of icon themes.
Both the wallpaper and all GNOME-Colors icon themes can be found on GNOME-Look, plus if you're running either Ubuntu or another Ubuntu-based distro, the entire GNOME-Colors series can be found in the repositories.
Enjoy, and happy new year! :-)