No, it's trying to say that the US money is based off Monopoly money, as Monopoly has been around a lot longer than these new colored bills. However, if you actually look up the real bills, they're nowhere near this bright in color, and some aren't even close. The $50 isn't even blue. Someone edited these to appear the right colors. The real bills are here:
http://www.newmoney.gov/uscurrency/50.htm
http://www.newmoney.gov/uscurrency/50.htm