CR – Contrast Ratio

The ratio of the brightest white to the darkest black on a display. The larger the number, the greater the extremes.

The contrast ratio will be listed as a:b where 'a' is the brightest white and 'b' is the darkest black. An example of a standard contrast ratio for an LCD display is 300:1, with IPS displays being as high as 800 or even 1000:1, meaning the displays is much brighter.