Canada's "monopoly money" tried by US

Guess there will be an end to American jokes about Canada's money, which uses different colours for different denominations, now that the new US $20 design will use a colour other than green, the first non-green US paper money in decades.

Americans may come to like this change. I'm used to the different colour Canadian denominations and find, when I am handling American money in the US, that I have to look harder at the individual bills to make sure that I don't pay for a candy bar with a US $50 bill by mistake. That may not be a bad thing, given the prevalence of counterfeit money mentioned in the story...but I find different colours are helpful.