I always liked the Yellow Black combination.
For those who love these colors, but also for others to try them!
It dominates Very Dark Desaturated blue (Dialog-Background, Panel-Background, View Background and Window Background ...), with Very Light Yellow and Strong Yellow color.
This theme will install as dependencies:
Plasma Theme "Yellow": Here
Plasma Color Scheme: "Yellow": Here
Aurorae Theme: "Yellow": Here
Icons: "Breeze Chameleon Dark": Here
Plasma Splashscreen "Yellow": Here
Recommended Wallpapers: Charlie-Henson