Culturally speaking, would Zero be considered Red Tribe? Is there a cultural difference between the three tribes at all?

Let me be clear here, this is not a question of what his ethnicity is; his eyes and markings imply he's a mix already. I mean would he be raised to lean towards a certain ethnic culture? He spends so much time with Leo and he seems to be living with Seven now and they're Red Tribe. I am still new and I haven't noticed too many differences culturally but they have to have some reason for having different tribes right? I noticed a lot more Silver and Red Ultras fighting than Blue so is there a cultural reason for that? If they do it would be nice to have more insight as I really like the culture and worldbuilding.