diff --git a/kcms/fonts/package/contents/ui/main.qml b/kcms/fonts/package/contents/ui/main.qml
--- a/kcms/fonts/package/contents/ui/main.qml
+++ b/kcms/fonts/package/contents/ui/main.qml
@@ -138,6 +138,7 @@
             enabled: antiAliasingComboBox.currentIndex == 0
             popup.height: popup.implicitHeight
             delegate: QtControls.ItemDelegate {
+                Kirigami.Theme.colorSet: Kirigami.Theme.View
                 id: subPixelDelegate
                 onWidthChanged: {
                     subPixelCombo.popup.width = Math.max(subPixelCombo.popup.width, width)
@@ -175,6 +176,7 @@
             enabled: antiAliasingComboBox.currentIndex == 0
             popup.height: popup.implicitHeight
             delegate: QtControls.ItemDelegate {
+                Kirigami.Theme.colorSet: Kirigami.Theme.View
                 id: hintingDelegate
                 onWidthChanged: {
                     hintingCombo.popup.width = Math.max(hintingCombo.popup.width, width)
diff --git a/kcms/fonts/previewimageprovider.cpp b/kcms/fonts/previewimageprovider.cpp
--- a/kcms/fonts/previewimageprovider.cpp
+++ b/kcms/fonts/previewimageprovider.cpp
@@ -104,7 +104,7 @@
     
     
     QColor text(QApplication::palette().color(QPalette::Text));
-    QColor bgnd(QApplication::palette().color(QPalette::Window));
+    QColor bgnd(QApplication::palette().color(QPalette::Base));
     
     PreviewRenderEngine eng(true);
     QList<QImage> lines;