component rollover color change

I am using the checkbox component and I want to change the color of the default green that I get when I rollover the component. How is that done?
I have the following to style my component otherwise. Is this the right way to do it? Or should I create a combined declaration?

this.checkBox.label = "Subscribe to Mailing List";
this.checkBox.setStyle("fontWeight", "bold");
this.checkBox.setStyle("color","0x000000");
this.checkBox.setStyle("fontSize","10")