[FMX] AS color motion tween

1

I want to make an AS based motion tween with colors. What’s the easiest way to do that? I Have already this code:

[AS]MovieClip.prototype.nL = function(nY, sN) {
this.onEnterFrame = function() {

	// nY
	this.dY = nY - this._y;
	this.mY = this.dY/sN;
	this._y += this.mY;

}
}[/AS]

Something like this would be perfect:
[AS]MovieClip.prototype.nL = function(nY, nC, sN) {
this.onEnterFrame = function() {

	// nY
	this.dY = nY - this._y;
	this.mY = this.dY/sN;
	this._y += this.mY;

       // nC
       // and here the code

}
}

blahblah.onRollOver = function() {
this.nL(20,0xFFCC00,5);
}[/AS]