Remember that a painting - before it is a battle horse, a nude model, or some anecdote - is essentially a flat surface covered with colours assembled in a certain order. ↗
White... is not a mere absence of colour; it is a shining and affirmative thing, as fierce as red, as definite as black... God paints in many colours; but He never paints so gorgeously, I had almost said so gaudily, as when He paints in white. ↗