Almost illegible text in some (Gtk?) apps

On my system, some apps have colors that make it almost impossible to read anything. This is a fresh install of Fedora 40 KDE with the Breeze Dark theme.

For example:

GIMP:

FreeFileSync:

I think this may be related to KDE neon - Plasma 6 upgrade broke Breeze dark theme in Gtk Apps

But I double-checked my plasma-integration version:

$ dnf info plasma-integration
Installed Packages
Name         : plasma-integration
Version      : 6.1.4
Release      : 1.fc40
Architecture : x86_64
Size         : 644 k
Source       : plasma-integration-6.1.4-1.fc40.src.rpm
Repository   : @System
From repo    : updates
Summary      : Qt Platform Theme integration plugin for Plasma
URL          : https://invent.kde.org/plasma/plasma-integration
License      : BSD-3-Clause AND CC0-1.0 AND GPL-2.0-only AND GPL-3.0-only AND LGPL-2.0-only AND LGPL-2.0-or-later AND LGPL-2.1-or-later AND LGPL-3.0-only AND (LGPL-2.1-only OR LGPL-3.0-only)
Description  : Qt Platform Theme integration plugin for Plasma.

How can I remedy this?

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It is not even just Gtk, Qtcreator search field is also concerned.

The color theme must be fixed, there is no way around it.

We need to Identify which colors should be changed, from being light to dark.
We have a theme used to debug that has different colors for every thing or close to, can’t remember its name.

Feel free to report a bug to https://bugs.kde.org for breeze.

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Thanks!

Bug report: 492024 – Some UI text almost illegible in Breeze Dark

Gimp and FreeFileSync still use GTK2 widgets,

Make sure your file ~/.gtkrc-2.0 contains at least the following lines:

gtk-theme-name="Breeze-Dark"
gtk-icon-theme-name="breeze-dark"

This happens in normal KDE apps as well such as the digital clock, when trying to change the font.

I went into the Carl color themes colors I’m using. Only text is set to white. So I’m not sure where to look to fix it.

It’s a weird issue, bug report for it is here 487387 – Use of unstyled Qt font selector dialogs constitutes a visual and usability regression

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