QML Debugger Console shows wrong values for color object

1. Create a new Qt Quick UI Prototype project using the wizard.
2. Open the project's qml file.
3. Inside the Window item, add the following lines:

       Rectangle {
           color: "green"
       }
   

4. Configure the project to run on a current version of Qt.
   With Qt 5.6, this still seems to work correctly. With Qt 5.10.1 and Qt 5.14.1, I could reproduce the bug.
5. Start debugging this project.
6. In the Locals view, select the Rectangle item.
7. In the QML Debugger Console, enter "color".
   The console will show a tree view representing the color object.
8. Expand that tree view.
   Among others, you'll see the values:

   b	1
   g	1
   r	1

   This has nothing to do with green.

The Locals view correctly shows "#008000". When using a Window item instead of a Rectangle, also the QML Debugger Console will show correct values.