diff --git a/src/libs/core/settings.cpp b/src/libs/core/settings.cpp
index 1306d134..12ea876c 100644
--- a/src/libs/core/settings.cpp
+++ b/src/libs/core/settings.cpp
@@ -17,6 +17,8 @@
 #include <QWebEngineSettings>
 
 #if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+#include <QStyle>
+#include <QStyleFactory>
 #include <QStyleHints>
 #else
 #include <QPalette>
@@ -50,6 +52,16 @@ Settings::Settings(QObject *parent)
     qRegisterMetaType<ExternalLinkPolicy>("ExternalLinkPolicy");
 #endif
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+    // When the OS color scheme changes, reapply the color scheme.
+    connect(qApp->styleHints(), &QStyleHints::colorSchemeChanged,
+            this, [this]() {
+        if (contentAppearance == ContentAppearance::Automatic) {
+            applyColorScheme();
+        }
+    });
+#endif
+
     load();
 }
 
@@ -71,7 +83,37 @@ bool Settings::isDarkModeEnabled() const
     return false;
 }
 
-Zeal::Core::Settings::ColorScheme Settings::colorScheme()
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+void Settings::applyColorScheme()
+{
+    Qt::ColorScheme scheme = Qt::ColorScheme::Unknown;
+    switch (contentAppearance) {
+    case ContentAppearance::Light:
+        scheme = Qt::ColorScheme::Light;
+        break;
+    case ContentAppearance::Dark:
+        scheme = Qt::ColorScheme::Dark;
+        break;
+    default:
+        break;
+    }
+
+    qApp->styleHints()->setColorScheme(scheme);
+    // setColorScheme() alone doesn't reliably update existing widgets:
+    //  - Widgets with stylesheets (QStyleSheetStyle) only update on polish().
+    //  - Direct palette consumers (QTreeView, QLineEdit) only update when the
+    //    application palette changes.
+    // Re-instantiating the style triggers the full unpolish-polish cycle for
+    // QStyleSheetStyle widgets and also updates the application palette via
+    // the new style's standardPalette().
+    QStyle *newStyle = QStyleFactory::create(qApp->style()->name());
+    if (newStyle != nullptr) {
+        qApp->setStyle(newStyle);
+    }
+}
+#endif
+
+Settings::ColorScheme Settings::colorScheme()
 {
 #if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
     return QApplication::styleHints()->colorScheme();
@@ -127,6 +169,10 @@ void Settings::load()
     }
 #endif
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+    applyColorScheme();
+#endif
+
     // Fonts
     QWebEngineSettings *webSettings = QWebEngineProfile::defaultProfile()->settings();
     serifFontFamily = settings->value(QStringLiteral("serif_font_family"),
@@ -296,6 +342,10 @@ void Settings::save()
 
     settings->sync();
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+    applyColorScheme();
+#endif
+
     emit updated();
 }
 
diff --git a/src/libs/core/settings.h b/src/libs/core/settings.h
index 0bce7058..97126bb7 100644
--- a/src/libs/core/settings.h
+++ b/src/libs/core/settings.h
@@ -132,6 +132,9 @@ signals:
 
 private:
     void migrate(QSettings *settings) const;
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+    void applyColorScheme();
+#endif
 
     static QSettings *qsettings(QObject *parent = nullptr);
 };
diff --git a/src/libs/ui/searchsidebar.cpp b/src/libs/ui/searchsidebar.cpp
index 48d03baa..7c74c5a8 100644
--- a/src/libs/ui/searchsidebar.cpp
+++ b/src/libs/ui/searchsidebar.cpp
@@ -44,6 +44,11 @@ SearchSidebar::SearchSidebar(const SearchSidebar *other, QWidget *parent)
     m_treeView->setFrameShape(QFrame::NoFrame);
     m_treeView->setHeaderHidden(true);
     m_treeView->setUniformRowHeights(true);
+
+    // A stylesheet (even an empty one) wraps the widget in QStyleSheetStyle,
+    // which properly re-polishes on dynamic color scheme changes.
+    m_treeView->setStyleSheet(QStringLiteral("QTreeView {}"));
+
 #ifdef Q_OS_MACOS
     m_treeView->setAttribute(Qt::WA_MacShowFocusRect, false);
 #endif
@@ -84,6 +89,7 @@ SearchSidebar::SearchSidebar(const SearchSidebar *other, QWidget *parent)
     m_pageTocView->setFrameShape(QFrame::NoFrame);
     m_pageTocView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     m_pageTocView->setItemDelegate(new SearchItemDelegate(m_pageTocView));
+    m_pageTocView->setStyleSheet(QStringLiteral("QListView {}"));
     m_pageTocView->setUniformItemSizes(true);
     m_pageTocView->setVisible(false);
 #ifdef Q_OS_MACOS
diff --git a/src/libs/ui/widgets/searchedit.cpp b/src/libs/ui/widgets/searchedit.cpp
index 6a140ea8..b0c87732 100644
--- a/src/libs/ui/widgets/searchedit.cpp
+++ b/src/libs/ui/widgets/searchedit.cpp
@@ -21,6 +21,9 @@ SearchEdit::SearchEdit(QWidget *parent)
     setClearButtonEnabled(true);
     setPlaceholderText(tr("Search"));
 
+    // Force QStyleSheetStyle wrapping so dynamic color scheme changes apply.
+    setStyleSheet(QStringLiteral("QLineEdit {}"));
+
     m_completionLabel = new QLabel(this);
     m_completionLabel->setFont(font());
     m_completionLabel->setObjectName(QStringLiteral("completer"));
diff --git a/src/libs/ui/widgets/toolbarframe.cpp b/src/libs/ui/widgets/toolbarframe.cpp
index 9decdf66..2bc4b548 100644
--- a/src/libs/ui/widgets/toolbarframe.cpp
+++ b/src/libs/ui/widgets/toolbarframe.cpp
@@ -12,6 +12,9 @@ ToolBarFrame::ToolBarFrame(QWidget *parent)
 {
     setMaximumHeight(40);
     setMinimumHeight(40);
+
+    // Force QStyleSheetStyle wrapping so dynamic color scheme changes apply.
+    setStyleSheet(QStringLiteral("ToolBarFrame {}"));
 }
 
 void ToolBarFrame::paintEvent(QPaintEvent *event)