How to get a stylesheet property?

[P@u1]

Hi,

I must know the background color of one of my widgets to set other components of this widget to the right color.
So far it looked like this:

m_blackCurve->setPen(QPen(m_Plot->palette().background().color()));

m_blackCurve->setPen(QPen(m_Plot->palette().background().color()));

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Now I'm using stylesheets so thhe palette().background() mehods don't work anymore (give wrong results).

How can I access the background color, which was set in the stylesheet, or is there maybe a better way to fix this?