Gigabyte Aorus KD25F 240 Hz Monitor review

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Color Accuracy and Gamma

Color space and screen uniformity

We start our tests by measuring color space and screen uniformity. Uncalibrated performance means the out-of-the-box settings a monitor ships with. Calibrated performance is what results after the monitor has been put through our calibration process. Our target with calibration is to be at Gamma of 2.2 with a target 6500k color temperature and a 120cd/m2 brightness. Luminance is candela per square meter (cd/m2) also more known with HDR monitors as as 'nits'.


The screen is not an HDR panel BTW. The color box you see below is the color gamut, a color gamut defines a more specific range of colors from the range of colors identifiable by the human eye (i.e., the visible spectrum). Various standards govern color gamuts. The two most common standards frequently cited in relation to personal computers are sRGB and Adobe RGB.


For our first baseline test in the default gamut (sRGB) mode, we reach 97 % of the sRGB color gamut, that is good. The color space, however, is slightly off in green, and the monitor clearly a slightly broader gamut at green and red.


So once we measure wide color gamut and test/compare with an AdobeRGB gamut, we retrieve a 75% of AdobeRGB. The AdobeRGB color space is comparable to a DCI-P3 and is really aimed at a HDR color space.


These monitors come factory calibrated for you, the next tests will back that fact. The average gamma value is also good with a measured deviation of 0.01 from 2.2


Gamma uncalibrated was at 1.9, there is an allowance deviation of 10%, so that is borderline acceptable really, however, we think it is a result of the Black Equalizer gamma enhancement. Of course, you are free to alter and tweak anything to your liking yourself as the monitor has selectable gamma modes.


From a practical perspective, the average human eye cannot detect any color differences with a Delta-E value of 3 or less, and an exceptionally trained and sensitive human eye will only be able to perceive color differences with a Delta-E of 1 or above. The monitor is excellent at an △E<1 average.

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