diff --git a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ColorEditor.qml b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ColorEditor.qml
index 7c7f92be258..45de99f361c 100644
--- a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ColorEditor.qml
+++ b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ColorEditor.qml
@@ -15,18 +15,20 @@ SecondColumnLayout {
     property color color
     property bool supportGradient: false
     property variant backendValue
+
     property variant value: {
-        if (colorEditor.backendValue === undefined
-                || colorEditor.backendValue.value === undefined)
+        if (!colorEditor.backendValue || !colorEditor.backendValue.value)
             return "white" // default color for Rectangle
 
-        if (colorEditor.isVector3D)
+        if (colorEditor.isVector3D) {
             return Qt.rgba(colorEditor.backendValue.value.x,
                            colorEditor.backendValue.value.y,
                            colorEditor.backendValue.value.z, 1)
-        else
-            return colorEditor.backendValue.value
+        }
+
+        return colorEditor.backendValue.value
     }
+
     property alias gradientPropertyName: popupLoader.gradientPropertyName
 
     property alias gradientThumbnail: gradientThumbnail
diff --git a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ItemFilterComboBox.qml b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ItemFilterComboBox.qml
index 61bcc7e6296..aa7e25e73cb 100644
--- a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ItemFilterComboBox.qml
+++ b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ItemFilterComboBox.qml
@@ -21,7 +21,7 @@ HelperWidgets.ComboBox {
     }
 
     property string defaultItem: qsTr("[None]")
-    property string textValue: comboBox.backendValue.expression
+    property string textValue: comboBox.backendValue?.expression ?? ""
     property bool block: false
     property bool dirty: true
 
diff --git a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/LineEdit.qml b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/LineEdit.qml
index 039f9e515ae..593a9b288d7 100644
--- a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/LineEdit.qml
+++ b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/LineEdit.qml
@@ -65,7 +65,7 @@ StudioControls.TextField {
                 lineEdit.text = ""
             } else {
                 if (lineEdit.writeValueManually)
-                    lineEdit.text = convertColorToString(colorLogic.valueFromBackend)
+                    lineEdit.text = convertColorToString?.(colorLogic.valueFromBackend) ?? ""
                 else
                     lineEdit.text = colorLogic.valueFromBackend
             }