I've installed FaienceZukiMac gtk3 theme and there's a "white balloon" surrounding each entry in the menu of every gtk3 program.
Here's a screenshot of what I'm talking about
How can I change it in order to remove that "white balloon" and make it the same color as the general background?
I was messing with the color values of the gtk-main.css with no luck. Also, I don't know the "real" name of that area of the window. Is it called menu bar?
Thanks in advance.