Beside slightly warm, the Nexus 6 color saturation is exactly same as Note 4 in adapted default setting.guess we all agree the N6 battery SUCKED!!
Well, apart from that, the phone is really good.
The colour is another problem but maybe can be fixed via software.
* tried Kcal but crashed on my N6 (Cyanogenmod12) - bummer *
Comparing to my S5 Prime (also qHD) , the color is over-saturated as I preferred to always
set my AMOLED devices to RGB or Cinema mode.
Why won't Cyanogenmod or other people release some emulator to the Samsung colour calibration settings? That would be really cool.
Now my screen no more warmer after slight tune using CM12 bundle color tune.

