The highest contrast ratio of the Acer K212HQL is 100000000:1. That's over twenty times the contrast ratio of a 5000000:1 PC screen, which is the most common contrast ratio.
A 100000000:1 dynamic contrast ratio is actually the best contrast ratio amongst all LCD screens of this spec and age.
A Mega Contrast dynamic contrast ratio is the worst contrast ratio amongst similar types of PC monitor.
There are a number of alternative flatpanel monitors that have a 100000000:1 dynamic contrast ratio currently available which you might want to consider including the G247HYL[pl_3029908_price], or the 12HQLB[pl_2943475_price] both from Acer which is cheaper.