The same way you'd pursue any woman. If she's not into that, she'll just say 'no thanks'.
Women love confidence (not to be confused with cockiness, which they normally don't like) and it shows greater courage to approach somebody of a different race than one's own. So you'll already have that working in your favor.
But most people tend to 'stick to their own' for some reason so that'll be working against you.
Just be polite and funny, women love a good sense of humor.