The highest contrast ratio of the Samsung NC221 is 1000:1. That's 100% less contrast ratio than a 20000000:1 flatpanel monitor, which is the most common contrast ratio. Across all medium monitors that have been available for more than two years the worst contrast ratio is Mega Contrast and the best is 100000000:1.
We think you might also be interested in some of the alternative flatpanel monitors that have a 1000:1 dynamic contrast ratio currently available including the LG 24M45, or the Samsung S23B350 which has a better Rating.
If you would prefer a PC monitor with a higher contrast ratio then you might want to consider the ZR24w (3000:1 and higher rated), or the ZR30w (3000:1 and higher rated) both from HP.