I want to iterate over line features to change color of each feature to the color I choose. 
So my file has 7 features, I want am writing the code below, but it does not seem to work.


    line_feats = [f for f in line_layer.getFeatures()]
    clr = ["blue","red","green","yellow","magenta","cyan","black","red"]
    for l in line_feats:
        line_layer.select(l.id())
        iface.mapCanvas().setSelectionColor( QColor(clr[l.id()]))
    line_layer.triggerRepaint()

I have tried printing l.id() and it goes from0 to 7, so indexing is not the issue. The thing is, it does not change the color individually, rather it changes for the entire file.