Setting color of Qgs Symbol to an expression or variable


This Content is from Stack Overflow. Question asked by Nidal Barada

I’m working with QgsSymbolLayer and I want to set the stroke color to an expression (@symbol_color) but I can’t seem to figure it out. And the documentation doesn’t talk about using expressions for it. I basically want to do what is in the photo below but with code

enter image description here

I have my symbol here:

symbol = QgsFillSymbol.createSimple({'color' : '15,0,43,255', 'outline_color' : 'Map : @sourceSymbol', 'outline_wdith' : '125' })

but have no idea how to change it to expression.

I can manipulate the symbol like this:


but setStrokeColor takes a QColor.


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