No, it's not true. You cannot remove color from your hair with anything that is typically hanging around your house. This is a process that is better left to a professional. It is complicated and can really damage your hair if you don't do it right. If you are detrmined to do this at home, visit a beauty supply store for products that are made to remove color from hair (they typically have many different products available depending on what you need).

Also see http://www.answerbag.com/q_view.php/13449

Good luck.