That would depend if your white is dominant or recessive and if its hiding something. White is a tricky one and not as obvious as most would think. You would have to know the lineage of your white bird to know for sure what genes it has.
I recently hatched eggs from my Langshan pen. In there I have a black roo, black hen, and 2 white hens. I put 10 eggs in the bator, one was clear, 9 hatched...