The Viseo 273Db has a maximum contrast ratio of 100000000:1. That's over five times the contrast ratio of a 20000000:1 PC display, which is the most frequently found contrast ratio.
This PC screen's contrast ratio (100000000:1) is in fact the best contrast ratio amongst all PC displays that are a similar age to the Viseo 273Db.
Amongst comparable types of PC screen the worst contrast ratio is Mega Contrast.
Alternative LCD screens that have a 100000000:1 dynamic contrast ratio currently available which you might also want to consider include the Acer H276HL (£239.99) which has a better Rating; or the Asus VW24 (£185.07), or the Acer 276HL (£139.99) which is cheaper.