How to get RGB fill color values from polygones?

Question

I'm trying to get color values from layers inserted into canvas. I used this code but it seems that I'm doing something wrong:

for layer in QgsMapLayerRegistry.instance().mapLayers().values():
    sym = layer.rendererV2().symbols()[0]
    fill = QgsSimpleFillSymbolLayerV2().fillColor()
    p=fill.getRgb()
    print(p)

I always get (0,0,255,255) as a result.

Also this is how it looks Layer properties from one of the polygones in canvas.

Is there any way or code to do this right?

I would also like to add that second fill color is added using this code:

sym = layer.rendererV2().symbols()[0]
fill = QgsSimpleFillSymbolLayerV2()
fill.setFillColor(QColor.fromRgb(result[0], result[1], result[2]))
sym.appendSymbolLayer(fill)

Answer 1

You assign layer.rendererV2().symbols()[0] to sym variable

sym = layer.rendererV2().symbols()[0]

but then call .fillColor() on QgsSimpleFillSymbolLayerV2() not on your symbol sym. So try:

fill = sym.fillColor()

In QGIS 3 it should be something like this (example for active layer):

lay = iface.activeLayer()
sym = lay.renderer().symbol()[0]
fill = sym.color()
print(fill.getRgb())