ColorTransform on a Gradient Fill

Can anyone give me a starter on how to accomplish this?

Basically in the gradient fill structure I wish to transform// change one of the colors
_spotLight.graphics.beginGradientFill(GradientType.RADIAL, [nuColor,0xFFFFFF], [nuAlpha,.005], [95,255], mtx);
and one of the alpha values.

is this possible with colorTransform, or should I just be redrawing the sprite ?