getProperty-TweenRGB

I am trying to use the getProperty to get the current RGB value of an object. Any ideas? I downloaded the TweenRGB class. Here’s the code:

import mx.transitions.Tween;
import mx.transitions.TweenRGB;
import mx.transitions.easing.*;

var txtClick:Tween = new TweenRGB (txt,"_rgb", Regular.easeOut, getProperty(txt, _rgb),0xB2BE2D,45,false);

stop();

If I use a hex# in place of the getProperty function it works fine. I just want a dynamic tween from one color to another.