Change the color instaed of alpha

I have finally created my menu the way I want it, but I’m wondering if there is a way to change the actual color instead of the alpha…

testbutton_btn4._alpha = 75;
testbutton_btn4.onRollOver = function() {
fade(this, this._alpha, 100, 0.85);
};
testbutton_btn4.onRollOut = function() {
fade(this, this._alpha, 75, 0.08);
};

is there a way to put in like “[color=red]this._tint[/color][color=black]” instead of this._alpha? I wanna change the color on the RollOver state.[/color]