The Acer V276 has a maximum contrast ratio of 100000000:1. That's over five times the contrast ratio of the most frequently found dynamic contrast ratio of 20000000:1.
This LCD screen's contrast ratio (100000000:1) is in fact the best contrast ratio across all medium monitors that have been available for more than two years.
Across similar types of LCD screen the worst contrast ratio is Mega Contrast.
There are a number of alternative PC screens that have a 100000000:1 dynamic contrast ratio currently available that you might want to consider including the Acer K272HU (£229.98) which has a better Rating; or the Acer FT220HQL which is cheaper.