//*1 Create a variable to store the color transformation named '$newColor'
//*2 Assign the new color
//*3 Assign the new color to your MovieClip named '$myMovieClip'

//*1
var $newColor:ColorTransform = new ColorTransform();
//*2
$newColor.color = (0xFFFFFF);
//*3
$myMovieClip.transform.colorTransform = $newColor;