Well, I guess that not all Twilight वैंपायर have to be pale from...well, what आप just said; Laurent is black. Perhaps whether a vampire becomes pale या not depends on his/her ethnicity. If a vampire was Caucasian या Asian, any ethnic background that allows them to have white skin, then maybe they are the ones who are shockingly pale. However, if a vampire was African-American या Hispanic या any other ethnicity that makes the person have a dark skin color, they keep the skin color they had when they were human. So maybe this explains why Laurent, unlike most vampires, is so dark skinned.
And don't worry, it doesn't sound racist at all! That's actually a pretty good सवाल to me :)