White magic is described as "good" magic, as opposed to black magic which draws upon the powers of evil beings. Opinions vary as to the differences between black and white magic, ranging from the idea that they are two names for exactly the same thing, to the belief that they are completely different, especially in goals and intent. The Bible does not differentiate between "good" and "bad" magic. Magic is magic as far as the Bible is concerned. Scripture doesn't distinguish whether the magic is supposed to be used for good or for bad; it's all forbidden because it appeals to a source of power other than God. Read more: http://www.gotquestions.org/white-magic.html#ixzz2RCggWlKV
Supposedly, white is for good, and black is for bad. In reality, they are both bad. Look at it like this, there is a clock on the wall. The small hand is at 12 and the long hand is at 6. White is 12 and black is 6. Now, even though the clock ran out of batteries and time stopped running, it will still be correct twice a day, at 12:30am and 12:30pm. It has the appearance of being correct, but reality it's all broken.