There is a meeting in which our elders dressed in the finest hooded silk robes convene in order to determine how white someone should be. They then bring the person (usually a newborn infant) to a sacred pool of mystical white liquid, where it is submerged. The longer it stays under, the more white it will become.
The only way to be truly white is to search for one of these white springs, break in, then bathe in its mystical waters.