Ok, I just tried this Lagom test with my HZ27WC and I can distinguish 1-32 for all colours, except blue which is distinguishable from the background only from 2 if viewed close to the monitor. Note that all the colours in row 1 are very difficult to see due to the reflection in my well lit room (I have the glass version). However, I justed compared with a matte 24" BenQ and that was even worse with colours only visible from 2 and 3, and on the right side the blue looked purple on the BenQ.
I have gotten used to the reflection, but I will not get a glass monitor next time. It is not a problem when working with white background, or bright colours, but for blue and black the reflection from any lightsource is very visible. I have tried putting my monitor facing a wall, but it made very little difference to the amount of reflection. The only thing that helps is to close all the blinds and turn off the light. It is a good monitor, and for the price I am happy with it, but you will have to accept seeing yourself in the monitor or work in a dungeon.