Hello,

i user Debian 9, Mate Desktop and a dark theme. Qt4 and Qt5 apps are horrible because they look like aliens in my desktop.

But i found this page: https://www.linuxuprising.com/2018/0...-style-in.html

So now, i have this in my ~/.bashrc
Great. It seemed the solution i just needed. I did all of it, and after it did not work, i even restarted the computer. No change.

Why virtualbox, wireshark and qtikz are still white, while my desktop things are *all* gray or dark gray? Can you help me solve this?

https://wiki.archlinux.org/index.php...K_Applications
Messy article, but after some troubleshooting I'm sure you can find the solution in there.
Probably most relevant excerpt:

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I found and installed the package qt4-qtconfig, which installs the command qtconfig-qt4 (what horrible lack of standard in naming things... 🙄). With it, i got this screenshot. I needed to change NOTHING in it, besides the "Select GUI Style" dropdown menu to "GTK+" { it was "Desktop Settings (Default)" }. The colors of most things seems right, except the preview of the window titles.

Why is this light blue bg with white letters?
Look: http://imgbox.com/KW0IhbFB

But after doing that, i wanted to find a Qt4 software to see it worked or not. Something small and portable (one file i can download and run, like Telegram is today, for example), preferably, since i am not needing anything new to use. The Qt things i have installed seems to be Qt5: (...) forget this paragraph. The first program i thought was Qt5, due a problem it has with colors, is Qt4: Bazaar Explorer. It already used fairly good colors. But it uses chosen colors for only parts of what is shown. For example: in an open project, it may have found a changed file; it will choose pure blue (#0000FF) in the text link text that will open the diff window for us, no matter what background color is being used. In my case, a pure blue is not that good to be read in it, but there is no way to change this - except changing something in the source code, i assume.

But Qt5 applications are still white! I read that page, ondoho, but what it says i already did. Can you, or anyone else reading this, help me solving this? The Qt5 software i am trying to see the fixed are:

1. DB Browser for SQLite

2. QTikz (to help doing some LaTeX drawings)

3. Oracle VM VirtualBox (virtual machines manager)

4. Wireshark (network traffic analyser)

5. VLC (? there is no mention of Qt in "Help > About" of vlc, but it is white like the other software in this list; can you confirm to me which Qt v3.0.8 uses?)

6. (?) Iced Tea Web Control Panel {just because it is white, but i have no clue if it is made using qt, the version is: "icedtea-web: (1.6.2-3.1), 1/14/17 5:27 PM" }

7. (?) Open JDK Java 8 Policy Tool (just because it is white, similar to the first five items of this list; there is nothing to show a version in the window i open with the Mate system menu {System > Preferences > Others > "Open JDK Java 8 Policy Tool"}

So, any ideas?

I have the same problem with Slackware-15.0

Semi-Solution: I installed kvantum. In environment I issued . You can added it permanently on system-wide profile, or in your user profile.

Now okular, sqlitebrowser, wireshark, frescobaldi are following the kvantum theme, but virtual-box not.