The Acer B226 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.
A 100000000:1 dynamic contrast ratio is in fact the best contrast ratio amongst all comparable spec PC monitors that have been available for more than two years.
The worst contrast ratio across similar types of flatpanel monitor is Mega Contrast.
It may also be worth also looking at one of the alternative flatpanel monitors that have a 100000000:1 dynamic contrast ratio currently available including the Acer V236HL ($86.99) which is cheaper; or the Asus VN279 ($172.99), or the Acer G237HL ($79.99) which has a better Rating.