The US is changing the...

The US is changing the color of its money: "The new design, referred to as NexGen, affects the $100, $50, and $20 notes. Circulation of the NexGen series could begin as early as fall 2003 with the introduction of the redesigned $20 note. The $100 and $50 notes will follow in twelve to eighteen months. Consistent with past design changes, the NexGen notes will remain the same size and use similar portraits and historical images to maintain an American appearance. The NexGen designs will include the introduction of subtle background colors. While color is not in itself a security feature, the use of color provides the opportunity to add additional features that could assist in deterring counterfeiting. The introduction of additional colors will also help consumers to identify the different denominations."