https://bugs.kde.org/show_bug.cgi?id=496990
Bug ID: 496990
Summary: Web Browser (and KHelpCenter) renderer does not adhere
to `kcm_colors`.
Classification: Plasma
Product: kdeplasma-addons
Version: 6.2.4
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: Web Browser
Assignee: plasma-b...@kde.org
Reporter: 4wy78...@rokejulianlockhart.addy.io
Target Milestone: ---
Created attachment 176320
--> https://bugs.kde.org/attachment.cgi?id=176320&action=edit
Reproduction screencast (for `#c0`).
SUMMARY
-------
Currently, the Web Browser plasmoid and `khelpcenter` render `about:blank` and
status code / error pages with a `#FFFFFF` background. At night, this can be
startling if `plasma-apply-colorscheme` is set to `BreezeDark`.
[STEPS TO REPRODUCE][7]
-----------------------
- 1. Add the Web Browser plasmoid to `plasmashell`.
2. - Navigate to `about:blank`.
- Navigate to `localhost:0/`.
- Invoke `khelpcenter`.
[OBSERVED RESULT][3]
--------------------
The `HTML`'s `background-color` appears to be hard-coded as either of the
undermentioned:
- ~~~CSS
HTML { background-color: #FFFFFF; }
~~~
- ~~~CSS
HTML { color-scheme: light; }
~~~
I doubt that `@media (prefers-color-scheme:` is involved.
[EXPECTED RESULT][4]
--------------------
As [Firefox permits using its `browser.display.use_system_colors`
preference][1], `about:blank` in `khelpcenter` the Web Browser plasmoid should
render usiung the system `.colors` scheme's background-attribute's colour
value.
To *my* knowledge, this can be remdiated by *unsetting* `background-color`, and
*setting* the undermentioned:
~~~CSS
HTML { color-scheme: light dark !important; }
~~~
However, this is merely a hypothesis.
[SOFTWARE/OS VERSIONS][2]
-------------------------
1. ~~~sh
#!/usr/bin/env -S bash
kinfo
~~~
2. > ~~~YAML
> Operating System : Fedora Linux 41
> KDE Plasma Version : 6.2.4
> KDE Frameworks Version : 6.8.0
> Qt Version : 6.8.0
> Kernel Version : 6.11.10-300.fc41.x86_64 (64-bit)
> Graphics Platform : Wayland
> Processors : 12 × AMD Ryzen 5 7600X 6-Core Processor
> Memory : 30.4 GiB of RAM
> Graphics Processor : AMD Radeon RX 5700
> Manufacturer : ASRock
> Product Name : X670E Taichi
> ~~~
ADDITIONAL INFORMATION
----------------------
Nominally filed here, because it becomes increasingly difficult to file at
[QtWebEngine][5] or [Chromium][6] if they don't believe that you've consulted
downstream first.
[1]: https://superuser.com/revisions/1480115/2
[2]: https://stackoverflow.com/revisions/76446386/3
[3]: https://imgur.com/a/qgupNfQ
[4]: https://imgur.com/a/0LlkZSM
[5]: https://bugreports.qt.io/secure/CreateIssue!default.jspa
[6]: https://issues.chromium.org/issues/wizard
[7]: https://youtu.be/MClyv7Gx5r4
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