Oh man not this again!!! Your phone is fine!! We have been through this already!! Read the entire thread before asking the same questions as the first poster that made this thread. There is absolutely unequivocally nothing wrong with your phone! Stop worrying about a millimeter of different color. My phone is the same way, which is an iPhone 7 Plus Product Red. It works just fine. I never even noticed this area until the poster of this thread made a big deal about it kind of like you are at the moment. He found out after tireless hours of asking Apple and everyone else he could that his phone was working just fine. But you can call and ask away if you like. Just don’t think you’re going to be too happy with the answers here as you are already questioning the answers that were given to you. Good luck with your quest. But remember you were told your phone is just fine and I suppose that isn’t what you want to hear. But it’s the truth and that is that!! Now have a good day!!