Make Python bool print 'On' or 'Off' rather than 'True' or 'False'

Question

What is the best way to make a variable that works exactly like a bool but prints On or Off rather than True or False? Currently the program is printing: Color: True, whereas Color: On would make more sense.

For the record, I initially tried to make an OnOff class that inherits from bool:

class OnOff(bool):
    def __str__(self):
        if self: return 'On'
        else: return 'Off'

From the comments, I now understand that bool is a singleton, which is why this failed miserably:

Traceback (most recent call last):
    class OnOff(bool):
TypeError: Error when calling the metaclass bases
    type 'bool' is not an acceptable base type

Answer 1

print ("Off", "On")[value] works too (because (False, True) == (0,1))

Answer 2

def Color(object):

    def __init__(self, color_value=False):
        self.color_value = color_value

    def __str__(self):
       if self.color_value:
          return 'On'
       else:
          return 'Off'

    def __cmp__(self, other):
        return self.color_value.__cmp__(other.color_value)

Although this could be overkill for you. :)