Color object prototype and this.onEnterFrame

Can you use the “this.onEnterFrame = function()” function within a Color.prototype function? I’m trying to write my own function to go from one color to another, but nothing works within my this.onEnterFrame function, but anywhere outside of it it works fine.

I’ve done this before, but using a movieclip prototype, so I know it’s not syntax. And if you can’t, for some reason, use this.onEnterFrame within a color prototype, how do you pass the name of a color object to a function so that I could just say changeColor(myColor, 0xffffff); to change it to white?

Thanks.