Update--After several emails back and forth with Luminara customer service, as well as providing, at their request, pictures of the outside and inside of 5 ivory candles, their response was that they probably picked up the color from my red Luminara candles sitting over a foot apart from them, but on the same mantle, out of the air. Really! Since this original post, I have had 2 tall white Luminara pillars develop the same phenomenon--and they are a fairly recent purchase that weren't even displayed--but still out of warranty. Just FYI.