Ambian 1mg Is My Past Hhas Been BLUE In Color.

ambian 1mg is my past hhas been BLUE in color. I/2 mg ambian has benn green in color. Is this true. I am not getting the same results om the 1/2 mg. My doctor prescribed 1mg but I think the pharmacy gave me 1/2 mg. are the colors different between the two? Please repond asap. I think the pharcy played fas and loose with me!!

Thank you very much for your input!