The global Spectrum theme for Strawberry Quartz. Allows configuration and features 2 neutral themes and one completely pink theme. The length of these names is getting out of hand. Kvantum theme is used in screenshots.
Strawberry Quartz Kvantum Theme
Lightly Shaders Kwin Effect
Strawberry Quartz Color Scheme
Spectrum Classic Strawberry Quartz Plasma Theme
Spectrum Classic Colors Plasma Theme
Spectrum Classic Colors Opaque Plasma Theme
Spectrum Classic Plasma Theme
Spectrum Dark Icons
Spectrum Window Decoration
The Spectrum themes change color according to the Color Scheme you have equipped.
From System Settings:
Go to "Colors" to change your Color Scheme. Included is a classic color scheme and a new version that has headers for windows.
Go to "Plasma Style" to change between Spectrum themes. Plain themes will change color with your Color Scheme, though you may need to reapply them.
Go to "Window Decorations" to change to Spectrum's Aurorae theme, which will take on the same color as your panel and menus.
To adjust transparency of the panel and menus:
Opacity can now be changed using the script included with theme. Navigate to the Plasma Style's directory and pass a value from 0 to 99 to the script.
$ cd .local/share/plasma/desktoptheme/spectrum-classic-strawberryquartz
Then reapply your Plasma Style in System Settings to update it.
$ ./changeOpacity 43
Under Workspace: Workspace Behavior > Desktop Effects
"Background contrast" to toggle between 2 levels of transparency.
"Blur" will let you choose the strength of the blur effect as well as noise.
There are a lot of other effects in Desktop Effects to try if you are new to KDE Plasma.
Have you tried turning it off and on again? Sometimes plasma assets will not update and some may still be themed to something you previously had set. This can usually be fixed by restarting.
To restart just plasmashell, open KRunner with "Alt + F2" to execute the following: