I've purchased eight different flip covers for my note 2. When closed, you'd have no idea it wasn't entirely that color. My first note 2 was gray, looked great in every color flip case I owned. Then, when I bricked the gray one, my replacement was white and the covers looked just as good. So, you can wait for the pink or in my opinion, get the white note 3 and go for a pink flip cover. (I say white, because my wife's S3 is white and looks great with her pink cover)
Oh, and before you think I'm rich owning that many flip covers, you can buy them off of eBay, with nfc chip for anywhere from four to thirteen dollars.