The L238DPH-2ES has a maximum contrast ratio of 1000000:1. That's 99% less contrast ratio than a 100000000:1 flatpanel monitor, which is the most common contrast ratio. Across all medium monitors that are a similar age to the L238DPH-2ES the worst contrast ratio is Mega Contrast and the best is 100000000:1.
We compared all the other flatpanel monitors that have a 1000000:1 dynamic contrast ratio to this PC display and we think the HP 27es (£170.34), and the LG 24MP48HQ-P (£133.95) which is cheaper is also worth considering.
If you would prefer an LCD screen with a higher contrast ratio then you might also want to look at the U2413 (£262.00) (2000000:1 and higher rated), or the U2415 (£186.67) (2000000:1 and higher rated) both from DELL.