I have a problem with GtkRadioButton

[yeajchao <yeajchao yahoo com cn>]

Hello all
   First of all, I apologize for my terrible english!
   I have a problem with GtkRadioButton.
   You know,when you select a GtkRadioButton,there
will be a "big point" placed in the circle of the
radio button .It maybe called "indicator".
   My problem is that: I want to change the
indicator's color to red or some other color,but I
don't know how to do that.
   Is there anybody want to help me?
   Any help would be much appreciated!

I tried to edit my gtkrc file 
but this seems just change the "text"'s color of the 


        

        
                
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