The highest contrast ratio of the Acer B276 is 100000000:1. That's over twenty times the contrast ratio of the most common dynamic contrast ratio of 5000000:1.
A 100000000:1 dynamic contrast ratio is in fact the best contrast ratio across all medium monitors that have been on the market for a comparable time to the B276.
Across similar types of PC display the worst contrast ratio is Mega Contrast.
It may also be worth also looking at one of the alternative PC displays that have a 100000000:1 dynamic contrast ratio currently available including cheaper PC displays such as the Neovo FM-24, or the Acer G276HLA.