System Settings/GNOME Application Style (GTK)

From KDE UserBase Wiki

This module lets you configure the theme for GNOME/GTK Applications.

System settings GTK theme
System settings GTK theme

These settings only apply for GTK applications. Look at System Settings/Widget Style to configure the theme of Qt application. If you are interested in better integration for GTK app, look at the list of KDE themes with GTK ports.

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