Due to the subjective nature of color judgment, lighting, and color grading, there can be confusion between white hair and other hair colors in the very light color range. This especially true in regards to blue hair, purple hair, and grey hair. A good idea is to compare the hair color to any other white objects in the picture. If the hair is the same color, it should be tagged white hair. If it is darker or differently-colored, use the appropriate non-white tag.
