Should the colorLabel be a real button

For now, the colorLabel class inherits QFrame, and so I think it should become a button for multiple reasons:
- 1. It doesn't give any feedback when it has keyboard focus,
- 2. It would be much easier to handle all operations done with it if it was a button,
- and 3. It's rendering would be done inside the QPushButton's class, so the general look'n'feel would be better.

So, is there a good reason to keep it as a QFrame?