Panel and Activities at same brightness levels

[fawtytoo]

The panel is normally darker without this extension but is there a way to have it the same brightness as the activities background if I use identical settings?
Example: i have the panel brightness set to 0.44 and the activities brightness set to 0.30 so they look the same brightness.

And if this can be done, if I select "Activities + Panel", the 2 sliders are locked?