Most Helpful Guy
First of all, just because your parents are against interracial relationships, doesn't mean they're racist. Some people are just traditional in the sense of dating. My dad is a white man against interracial dating but he has African-American, Latino, Asian friends and so on. He just has that traditional mindset. I have nothing against interracial relationships myself but I won't call these people RACIST. Unless, of course, your parents are actually racist for other reasons you didn't list.
Anyway, this is a tough situation, since you're under 18 years old. I would try to convince your parents but this probably won't go over too well. Unfortunately, since you're under 18, they have authority over you. Good luck.
Most Helpful Girl
Tell them that you love him and you really want them to accept him.