Color a movieclip

ok! i have this code:
this.createEmptyMovieClip(“my_mc”, 20);
with (my_mc) {
color = 0x777777;
lineStyle(2, 0x000000, 100);
beginFill(colore);
lineTo(0, 0);
lineTo(100, 0);
lineTo(100, 20);
lineTo(0, 20);
endFill();
}
i want to change the color of this movie clip with a rollover
my_mc.onRollOver {
???
}
what i have to put to change the color on 0xAAAAAA?
and… can i put all in a function?
and… can i put a text on that mc, with the change of color of text too on roll over?