Syntax to change backgorund color on a property change

What syntax would I use for the color.

if (event.source.parent.lbs == 0):
value = ??‘Red’??
event.source.editableBackground = value
else:
value = ??‘Green’??
event.source.editableBackground = value

See fpmi.gui.color()

if (event.source.parent.lbs == 0): value = fpmi.gui.color('red') event.source.editableBackground = value else: value = fpmi.gui.color('red') event.source.editableBackground = value