Some of the crappiest paint ever, also not sure why you have white primer with black paint, any rock chips will show through bright white. I don't see this turning out well at all.
I always use a different color base primer. If rock chips are revealing your primer under your paint coats, you are f**king up pretty bad..I do agree that white is probably a pretty drastic difference, but that's just my $.02.
As far as that color, it should be okay. A lot of people will recommend you to paint-match it at a body shop, but that can be pricey, so this is a decent alternative. Just follow what others have said in this thread, and you'll be good. Also, Dupli-Color sells Flamenco Black Pearl paint in a spray can at Auto-Zone for touch-ups, if I remember correctly!