The highest contrast ratio of the HS221HPB is 80000000:1. That's over four times the contrast ratio of a 20000000:1 PC display, which is the most common contrast ratio. The contrast ratio of all medium monitors that have been around for around the same time as the HS221HPB ranges from Mega Contrast to 100000000:1.
There are a number of alternative PC screens that have an 80000000:1 dynamic contrast ratio currently available which you might want to consider including the Hanns.G HS221[plb_2361044_price] which has a better Rating; or the Asus VE228[plb_1584525_price], or the Hannspree HL226HPB[plb_2400523_price] which is cheaper.
If the contrast ratio of this PC monitor is not high enough for you then you might want to look at the Acer 222HQL[plb_2562617_price] (100000000:1 and cheaper) or the Acer G237HL[plb_2266292_price] (100000000:1 and higher rated).