GTK2 Menu bars are white
It's the same in GTK 3, I think it is intentional since everything is white now in the light themes.
No it isn't the same: in gtk3 is a very light gray, in gtk2 is completely white
GTK2

GTK3

Oh I see. You are correct.
Is there any other gtk2 app where you can reproduce the issue?
Audacious

pgAdmin III

Qt5 apps with GTK+ theme support, like virtualbox

It also affects the Bionic snap.
Pushed the fix also to bionic @Amr-Ibra
(edge channel)
Could you please also fix this for Yaru-dark and GTK2 apps? GTK2 apps have a very dark menubar, while GTK3 apps have a lighter menu.
Screenshot with Shutter (GTK2):

and Nemo (GTK3):

Most helpful comment
Audacious

pgAdmin III

Qt5 apps with GTK+ theme support, like virtualbox
