diff --git a/sidebar/package/contents/ui/CategoriesPage.qml b/sidebar/package/contents/ui/CategoriesPage.qml
--- a/sidebar/package/contents/ui/CategoriesPage.qml
+++ b/sidebar/package/contents/ui/CategoriesPage.qml
@@ -27,7 +27,8 @@
     id: mainColumn
     Component.onCompleted: searchField.forceActiveFocus()
 
-    header: Item {
+    header: Rectangle {
+        color: Kirigami.Theme.backgroundColor
         width: mainColumn.width
         height: Kirigami.Units.gridUnit * 2.5
         RowLayout {
diff --git a/sidebar/package/contents/ui/SubCategoryPage.qml b/sidebar/package/contents/ui/SubCategoryPage.qml
--- a/sidebar/package/contents/ui/SubCategoryPage.qml
+++ b/sidebar/package/contents/ui/SubCategoryPage.qml
@@ -33,9 +33,11 @@
         Accessible.role: Accessible.Button
         Accessible.name: i18n("Back")
 
-        Item {
+        Rectangle {
             id: headerControls
 
+            color: Kirigami.Theme.backgroundColor
+            
             anchors.fill: parent
 
             QtControls.ToolButton {
@@ -46,7 +48,6 @@
 
                 RowLayout {
                     anchors.fill: parent
-                    opacity: 0.3
 
                     Kirigami.Icon {
                         id: toolButtonIcon
@@ -65,8 +66,6 @@
                         text: subCategoryColumn.title
                         verticalAlignment: Text.AlignVCenter
                         elide: Text.ElideRight
-                        //FIXME: QtControls bug, why?
-                        Component.onCompleted: font.bold = true
                     }
                 }
             }
@@ -76,9 +75,6 @@
                 text: subCategoryColumn.title
                 elide: Text.ElideRight
                 visible: !backButton.visible
-                opacity: 0.3
-                //FIXME: QtControls bug, why?
-                Component.onCompleted: font.bold = true
             }
         }
         Kirigami.Separator {