“KDE Plasma theme” can mean a dozen different things. Plasma splits its look into separate parts: colours, icons, window borders, the panel style, the cursor, the login and lock screens and more. A global theme bundles several of those parts so you can switch them in one go.
The steps come from KDE’s System Settings documentation, the KDE Store and KDE’s own statements, checked on October 16, 2026, two days after the release of Plasma 6.8. KDE’s handbook pages for these settings were last revised for Plasma 5.27, so a button may sit in a slightly different place on your screen. The menu path below is the one KDE uses in its Plasma 6.8 announcement.
What each kind of theme changes
KDE’s documentation lists what a global theme can set. Each part also has its own page in System Settings, so you can change it alone.
| Part | What it changes |
|---|---|
| Desktop layout | The arrangement of panels and widgets |
| Color scheme | The colour palette of Plasma and its applications |
| Application style | Buttons, menus, scroll bars and other controls inside apps |
| Plasma style | Panels and widgets |
| Window decoration | Window borders and title bar buttons |
| Icons | Icons across Plasma and its applications |
| Task switcher | The Alt+Tab overlay |
| Splash screen | The loading screen while Plasma starts |
| Login screen | The user list and password prompt at startup |
| Lock screen | The password prompt when the computer is locked |
| Wallpaper | The desktop background |
Cursors have their own page too, with a size setting for themes that offer one. Colors also has an accent colour: keep the one from the colour scheme, take one from your wallpaper, or pick your own.
How to apply a global theme
- Open System Settings > Colors & Themes > Global Theme.
- Hover over a theme and click the image icon to see a preview.
- Click the theme. A dialog asks which parts to apply: the appearance settings, the desktop layout, or both.
- Choose what you want and click Apply.
Be careful with the desktop layout box. It replaces your panels and widgets with the theme’s arrangement. If you only want the colours and icons, leave it unticked, or skip the global theme and set each part on its own page.
Where to get more themes
The Global Theme, Colors, Icons and Cursors pages each have a Get New button, such as Get New Global Themes or Get New Cursors. It opens a download window that lists themes from third-party authors; you need an internet connection. Click Install, close the window, and the theme is ready to apply. The icons, colors and cursors pages can also install a theme from a file you downloaded.
The same content lives on the KDE Store in your browser. It keeps separate categories for Plasma 5 and Plasma 6 global themes. Plasma 6 users should stick to the Plasma 6 category.
To remove a theme you downloaded, hover over it and click the trash icon. You can only remove themes you installed yourself, not the ones Plasma ships with.
Why KDE says to be careful
In March 2024, a global theme on the KDE Store ran a script that deleted a user’s files. KDE developer David Edmundson described the cause as a mistake in shell parsing, not malice, and the theme was removed quickly. KDE then posted a warning in the Announcement section of its Discuss forum: “Global themes and widgets created by 3rd party developers for Plasma can and will run arbitrary code.” It encouraged users to “exercise extreme caution”.
The reason is in Edmundson’s post: “A global theme can ship custom lockscreens, custom applets, custom settings and all of these can run arbitrary bundled code.” That is how the system is designed; locking it down would remove features. His advice: check content locally before you install it, or look for reviews from trusted sources. He wrote that KDE would keep the explicit warning shown when you download add-ons, and that in the longer term it plans to separate safe content, meaning metadata and artwork, from content that can run scripts, and to add curation and auditing to the store.
That gives you a practical rule. A colour scheme, an icon set, a cursor theme or a plain wallpaper image is artwork. A global theme or a widget can carry code. If you want a new look with less risk, build it from the individual pages and skip third-party global themes.
How to go back to the default
Plasma’s default look is Breeze. It ships with Plasma, and the Global Theme page only lets you remove themes you downloaded, so Breeze is always there. To return to it, open Global Theme again, click Breeze, choose the parts to apply and click Apply. To fix one part only, go to that part’s page and pick Breeze there.
New in Plasma 6.8: Union
Plasma 6.8 ships a beta of Union, KDE’s new theming system. It can now style both Qt Quick and Qt Widgets apps, including Dolphin, Kate and Konsole. KDE says Union is not ready to be the default, and apps should look nearly the same as with the regular Breeze style. To try it, install the union package (the name may differ on your distribution), apply Breeze (Union) in System Settings > Colors & Themes > Application Style, and restart your apps.
Plasma on the Steam Deck
Valve describes the Steam Deck’s Desktop Mode as a stock KDE Plasma experience. The System Settings pages in this guide are the ones to look for there. Our guide to Steam Deck mods covers what else you can change in Desktop Mode. On Windows, the closest thing to Plasma widgets is Rainmeter skins.
Sources
- KDE documentation: Global Theme
- KDE documentation: Colors
- KDE documentation: Icons
- KDE documentation: Cursor Theme
- KDE: Plasma 6.8 announcement
- KDE Store
- David Edmundson: Trusting content on the KDE Store
- KDE Discuss announcement: Global themes and widgets can run arbitrary code
- Steam Support: Steam Deck and Steam Machine Desktop FAQ