def __getitem__(self, role):
scheme = KColorScheme(QPalette.Active, KColorScheme.Window)
role, alph = role.split()
role = KColorScheme.__dict__[role]
try:
color = scheme.foreground(role).color()
except TypeError:
color = scheme.background(role).color()
return 'rgba({}, {}, {}, {})'.format(
color.red(), color.green(), color.blue(), alph or color.alpha())
