How to use the attrs.ColorAttr function in attrs

# Same here
	   posi = widget.position
	   widget.position = (10, posi[1])

	Here they are.

	   - x: Integer: The horizontal part of the position attribute.
	   - y: Integer: The vertical part of the position attribute.
	   - width: Integer: The horizontal part of the size attribute.
	   - height: Integer: The vertical part of the size attribute.

	"""

	ATTRIBUTES = [ Attr('name'), PointAttr('position'),
		PointAttr('min_size'), PointAttr('size'), PointAttr('max_size'),
		ColorAttr('base_color'),ColorAttr('background_color'),ColorAttr('foreground_color'),ColorAttr('selection_color'),
		Attr('style'), Attr('font'),IntAttr('border_size'),Attr('position_technique'),
		UnicodeAttr('helptext')
		]

	DEFAULT_NAME = '__unnamed__'

	HIDE_SHOW_ERROR = """\
		You can only show/hide the top widget of a hierachy.
		Use 'addChild' or 'removeChild' to add/remove labels for example.
		"""

	def __init__(self,parent = None, name = DEFAULT_NAME,
				 size = (-1,-1), min_size=(0,0), max_size=(5000,5000),
				 helptext=u"",
				 style = None, **kwargs):