shadow(color, blur, x, y) → {Phaser.BitmapData}
Sets the shadow properties of this BitmapDatas context which will affect all draw operations made to it.You can cancel an existing shadow by calling this method and passing no parameters.Note: At the time of writing (October 2014) Chrome still doesn't support shadowBlur used with drawImage.
Parameters
Name Type Argument Default Description color string The color of the shadow, given in a CSS format, i.e. #000000 or rgba(0,0,0,1). If null