Unsolved How to access the default border color

[l3u_]

Hi :-)

I'm trying to get a project fit for use with KDE's Breeze dark theme. Thus, I'm replacing hard-coded CSS values with palette ones, e. g. background-color: palette(base) instead of background-color: white.

But I don't find the correct value to access the color which is used to draw the borders of widgets (QGroupBox, QPushButton, QLineEdit and so on).

How can I get this one?

Thanks for all help!