Could be really racist, could be "colourblind" racist, could be genuinely non-racist. Rich white people from Louisiana are diverse in their opinions and morality, like people everywhere.
So really it's up to you and your group. Personally I'd be inclined to make him non-racist because roleplaying as a racist seems like the opposite of fun to me, but I'm obviously not you.
I have a racist character and I find it challenging to play. He's PbP and when I want to write something 'in character', I realize that it would be very insensitive to write certain things even though I don't mean them, personally. I, therefore, end up changing things up. Your group might be more forgiving of stuff like that. pbp is a public forum while your game might be more private.
On that note, you could always be racist against a fictional group like White Court Vampires or Summer Fairies.
Think of it this way: If Aliens attacked the planet, humans (as a race) might unite against the common foe. Supernatural baddies kind of create that Us(humans) vs Them(Monsters) attitude.
So, maybe your character USED to be racist but when he found out about the supernatural, he changed his attitude - or more specifically, changed the outlet for his racist tendencies.
Which is kind of what I've done with my racist character.