Changing color of each selected feature based on expression using PyQGIS?

Question

Code below changes the color of all the selected features based on the last condition it satisfied instead of changing the color of the feature which satisfied the condition.

for f in FEATURES:

    total = f['parkeer_approx']
    alloted = parking_capacity[f.id()-int(1)]['parking_capacity']

    print(total,alloted)

    if total == alloted:
        print('in red')
        iface.mapCanvas().setSelectionColor(QColor("red"))

    elif alloted > 0 and alloted < total:
        print('in orange')
        iface.mapCanvas().setSelectionColor(QColor("yellow"))

    else:
        print('in green')
        iface.mapCanvas().setSelectionColor(QColor("green"))

What I want is to change the color of each selected feature separately based on the conditions defined in the code above.

How can I achieve that?