I’m worried that my son going to get bullied, because he’s mixed.

I’m 31 weeks and 6 days pregnant with a baby boy. My fiancé is Mexican and I’m black (light skin). When my son gets to school age and experience bullying how should I talk to him? What should I say to him? I know it’s a chance that he could get bullied, because my fiancé has 4 kids from a previous relationship and they had got bullied for being mixed before. I just need some advice mommas. It would break my heart if I heard my son was getting bullied for being mixed.