My 5x is a week old today mine had the yellow screen hue that some phones seemed to have had, I rang Google to advise them of this for which they said it could be something to with the glue from the screen not being dried out properly and to give my phone a few days of use to see if there's any change.
After giving it a few days I think I can see a slight change in colour and the white of the phone getting a little whiter, when compared to my iphone 5s you can clearly see the difference in colour the 5s is white with a trademark blueish hue where my 5x seems whitish/yellow not bright yellow but a really dull yellow.
So I'm going to give it a few more days before I decide to bring it back and swap the 5x for something different or chance getting another 5x with the hope of getting a fresh recently built 5x model.
P.s I do like my nexus 5x BTW solid phone for the price!
Posted via the Android Central App