How to use a color value returned by colorChooser?

[Muddy Coder]

Hi Folks,

This should be a simple question, but I just can't get an answer from
Phython Docs. You see, when we created a widget, and need to tweak the
color, we just simply configure it, such as:

abutton = Button(root, text='Foo')
abutton.config(fg='blue')

so we can make the Button color in blue. However, when I choose a
color by a color Dialog, askcolor, and then I will get a color value
as:   (0, 0, 255) ..... So, I want to use this returned color value to
configure my existing widgets, with widget.config() syntax. The Python
interpreter does not take it. Therefore, I think I must need to covert
this returned color value into a symbolic name, such as 'blue', 'red'
and so on, then the widget.config() syntax can be used. How can I
convert this color value? Please help, thanks folks!

Cosmo