Mirage KDE look and feel is a purple/black theme to use with transparency enabled if you like or solid is the way I use it.
Click on the screenshots to enlarge so they will not be blurry

Mirage Plasma theme is here:
https://www.opendesktop.org/p/1312311

Mirage color scheme is here:
https://www.opendesktop.org/p/1312310

Mirage icons are here:
https://www.opendesktop.org/p/1312316

I recommend using force blur script to enable transparency. It can be found here:
https://store.kde.org/p/1294604/

A nice tutorial on installing it and setting it up is here:
https://userbase.kde.org/Tutorials/Force_Transparency_And_Blur


Wallpaper in screenshot is from Charlie Henson.
https://www.pling.com/p/1312197

The original Sweet Aurorae theme is here:
https://store.kde.org/p/1286856

The original Sweet Plasma theme is here:
https://store.kde.org/p/1294174/