Gray Person
Its a white person that has darker skin because one of his/her parent is black and the other is one white. It's basically a half white and half black (Half African and Half Caucasian (Caucasus, Russian, Turkish)/European) but mostly whiter.
John: Hey, what's your ethnicity?
Noah: I'm gray person.
John: ?
Noah: I'm white but darker.
John: Oh, Alright.
Noah: I'm gray person.
John: ?
Noah: I'm white but darker.
John: Oh, Alright.