When I went to China in 2002 I bemoaned American paper money. This was before the era of the Big-Head bill, when the dollar was much drabber than it is today. The dollar still doesn't match the Yuan for color.
The Dream Dollars website makes art out of money, money that is art, every aspect, from the denominations in a irregular sequence to the fact that it changes from season to season. The colors are still muted, but the imagery is rich and detailed. Dreamlike.