All in all the uniformity is not the strongest point for the AOC U3277PWQU and the Philips 328P6VJEB, but what about the colour quality in general? We measure this at the center of the panel. We should mention that both monitors have a panel that has an above average colour space – larger than sRGB but smaller than DCI P3 or AdobeRGB. In standard mode this results in slightly oversaturated colours, that therefore look ‘good’ – but both monitors also have an sRGB-mode, in which they perform a lot better. Below you can find the results for both settings, first the standard- and then the sRGB-mode.
For starters we look at the coverage of the sRGB colour space. In the standard mode we measure 99.9% for both monitors – below you can find that the colour triangle is a lot bigger than that of sRGB, but because it is not completely covered this percentage remains just below 100.
In sRGB-mode the coverage of the Philips and the AOC is slightly less, the Benq and Asus perform better here. That said, the difference is not all that big.
Secondly we also look at the colour temperature of white. With the standard setting the AOC is slightly below 6000 K, which is the lower limit in our opinion – below that the image is visibly warmer (yellow/orange) in terms of colour. The Philips is also slightly lower than the Asus and Benq, but this difference is nearly invisible in practice.
We find that the AOC performs a lot better in sRGB-mode and the Philips performs nearly perfect. The two can clearly compete with the considerably more expensive competitors.
We were already measuring the colour- and grayscale value deviation based on the CIE2000 norm (we used the CIE1994 norm for a long time), but with the new test method we also add in the standard deviation. Simply put this gives an indication of the amount at which the sub-measurements that the average deviations are based on, deviate from the average measurement. Aside from that the averages are now based on a bigger number of sub-measurements. These can be found with the screenshots for every tested product. There you can also find the so-called saturation sweeps, that show to what extent the head- and support colours, meaning RGB and CMY, deviate from the desired values in a continuum.
First we take a look at the results in the standard mode, where the AOC and the Philips show slightly oversaturated but very ‘rich’ colours. We see a deviation of 4.9 for the AOC and 3.29 for the Philips – we think that the former is simply too high, while the latter is reasonable but compared to the competitors it is not more than that. The standard deviation is also relatively high in this stance for both models.
Looking at the colour error in sRGB-mode, the Philips 328P6VJEB ends up at a phenomenal deviation of 1.04. The AOC U3277PWQU ends up at an excellent 1.53 – comparable with that of the Asus PA329Q. Furthermore, just as important, the standard deviation is a lot smaller than that of both of the more expensive competitors. We cannot state anything other than that the manufacturer of both monitors has done an excellent job with the calibration.
The grayscale deviation is not all that bad in the standard mode for the AOC, and simply excellent for the Philips. However, there is a relatively high sd especially for the U3277PWQU.
Looking at the sRGB-results, the Philips ends up in first place again with no small advantage. The AOC ends up in third place, but also with a good result.
Remarkably, the average gamma values for both models are slightly better in standard mode than in sRGB-mode (below), but both show an excellent result.
Below you can find the screenshots for the test results of the AOC U3277PWQU, first in standard mode and then in sRGB-mode. Note that the gamma- and grayscale values are a lot better in sRGB-mode.
The same goes for the Philips 328P6VJEB. The differences between the standard and sRGB mode are smaller, but still visible.