Description:
------------
There is no easy way to convert the rgb values from a GdkColor object to normal 
hex or rgb. GdkColor uses seperate red, green and blue values ranging from 0 to 
65535.

Test script:
---------------
print_r($colorbutton->get_color());

[0] => GdkColor Object
        (
            [red] => 56815
            [green] => 7663
            [blue] => 7663
            [pixel] => 0
        )