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I'm using a dark theme in Debian, but the Dolphin file manager just ignores it.

I have seen some examples of a dark theme in Dolphin, but I can't find a way to do it. I've seen some ways to set a background image, but of course that doesn't help me, because I would have black text on black background.

From what I've seen I might need a KDE theme. I have found this, but it gives me a .qtcurve file.
I looked up how to use it and this page told me to use KDE system settings. Sounds weird, but ok, I installed the systemsettings package.
But in the KDE system settings I only had the categories "shortcuts", "network settings" and "network connectivity". So I installed kde-config-gtk-style and it did indeed add the "application style" category to the KDE settings.
There I first tried setting "BlackMATE" as the GTK2 and GTK3 theme, which did nothing. Then I tried importing the downloaded theme file, which didn't work, because it expected a .tar file.
So I packed the theme file into a .tar archive (which seems weird, why would I need to do that?) and imported that, which made the settings window become unresponsive and then close itself. I guess it's not the sort of tar file it expects?
When I click "download GTK2 themes" or "download GTK3 themes", it stays at "initialising" and does nothing.

So how do I set a dark theme in Dolphin? Do I even need the KDE settings?

Debian 9.5
Cinnamon 3.2.7
Dolphin 16.08.3

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I'm using a dark theme and it simply applies to Dolphin as well.

I just tested it out again and I did notice that after switching from light to dark again, I had to close the running Dolphin instance and start a new one to have the dark theme take effect. But I guess you tried that already..?

Btw, I use the Breeze Dark theme: Breeze Dark theme

You can find this setting under KDE's System Settings > Appearance > Workspace theme > Look and Feel enter image description here Maybe it is a bug in that KDE version or debian release, did you try testing out the latest version (in a virtual machine)? I'm on Dolphin 17.04.2.

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    My Dolphin version is 16.08.3 and Synaptic (and apt-get) doesn't find any updates for it. My settings have the categories "Startup", "View modes", "Navigation", "Services", "Trash" and "General", also there are less buttons at the bottom. Since I didn't really write that into the question, my Debian version is 9.5. – Fabian Röling Oct 2 '18 at 19:28
  • The setting I showed is in the KDE System Settings. I updated the answer to explain where to find it. In your question you mention the categories you have in your System Settings but Workspace Theme does not seem present. Maybe you have to install a package to have the workspace theme settings? – mxttie Oct 2 '18 at 20:01
  • btw, I looked up: the workspace settings are in the package `plasma-workspace', for debian stretch I found a package here: packages.debian.org/stretch/plasma-workspace . The dark theme itself (I'm using), is contained in breeze5-style, for debian, that seems to be packages.debian.org/stretch/breeze – mxttie Oct 2 '18 at 20:08
  • I installed plasma-workspace and it does add a few more menus, but not that one. I have now: "Application style", "Desktop behaviour", "Shortcuts", "Applications", "Settings", "Connectivity", "Power management". – Fabian Röling Oct 2 '18 at 22:51
  • I looked up the file to be responsible for the "Workspace Theme" settings: settings-appearance-workspacetheme.desktop. This file is contained in the systemsettings package: packages.debian.org/stretch/amd64/systemsettings/filelist . Do you have this one installed? – mxttie Oct 3 '18 at 10:10

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