You have had it for less than 24 hours now. Don't make harsh decisions because you found negativity on the internet:
http://www.cultofmac.com/192299/does-your-iphone-5-screen-seem-yellow-dont-worry-overmuch/
http://forum.xda-developers.com/nexus-4/general/screen-yellow-tint-warming-t1990276
http://forums.wpcentral.com/nokia-lumia-920/206737-warm-yellow-tint-screen.html
and it happens every year with some phone and later people laugh about it but the kicker is, they still fall for whatever the next flavor of Antennagate, display panic or connectivity issue may be.
There are masses of retards out there that rely on spoonfed info from sensationalist news they read on technoob clickbating sites. Trust me when I tell you, just because someone is posting about a relatively unknown phone doesn't mean they know what the (censored) they are talking about. Care to guess how many puberty entering bipeds have gotten their hands on their very first smartphone with the 1? Can't expect these (censored) tardosaurs to actually have any smartphone or life relevant knowledge. The rest of the tardpede is made up mostly of sad, whining individuals that have been nothing but a drain on society and finite resources. Pick a random mall and drive your car through it, you are bound to take dozens of them with you.
TL;DR Try exposing the phone to sunlight an hour a day.