The highest contrast ratio of the Dreamcolor Z27 is 1000:1. That's 100% less contrast ratio than a 20000000:1 LCD screen, which is the most common contrast ratio. Across all LCD screens that have been on the market for around the same time as the Dreamcolor Z27 the contrast ratio ranges from Mega Contrast to 100000000:1.
We compared this PC monitor to all the other PC screens that have a 1000:1 dynamic contrast ratio and we think because of it's better review score, the Samsung S23B350, and the Eizo ColorEdge CS230 (£426.99) is also worth considering.
If you are looking for a PC screen with a higher contrast ratio then you might want to look at the ZR24w (3000:1), or the ZR30w (£837.90) (3000:1) both from HP which also has a higher Rating.