<oRadioGroup>:setColor([<cColorString>]) --> self

        <cColorString> is a character string that indicates the color
        attributes that are used by the radio button's display() method.  The
        string must contain seven color specifiers.

        RadioButto Color Attributes
        ---------------------------------------------------------------------
        Position     Applies To                            Default Value from
        in colorSpec                                       System Color Setting
        ---------------------------------------------------------------------
        1            A radio button when it is unselected    Unselected
                     and does not have input focus
        2            A radio button when it is selected and  Unselected
                     does not have input focus
        3            A radio button when it is unselected    Enhanced
                     and has input focus
        4            A radio button when it is selected and  Enhanced
                     has input focus
        5            A radio button's caption                Standard
        6            A radio button caption's accelerator    Standard
                     key when it does not have input focus
        7            A radio button caption's accelerator    Background
                     key when it has input focus
        ---------------------------------------------------------------------

        setColor() is a method of the RadioGroup class that is used for
        uniformly setting the color attributes of all the radio buttons in
        its group.  setColor() accomplishes this by setting the colorSpec
        instance variable of each of the radio buttons in its group to the
        value specified by <cColorString>.