Plasma Thema with interesting Task Buttons, in more colors (blue, yellow, dark red, lime green). The theme is with plenty of blue details.
Panel-Background and Background are in the same dark shade, and are not transparent.
This theme will install as dependencies:
Plasma Theme "Three-Colors-Blue": Here
Plasma Color Scheme: "Dark-Three-Colors-Blue": Here
Aurorae Theme: "Three-Color": Here
Icon Theme "Breeze Chameleon Dark": Here
The author of the wallpaper: charlie-henson: Here