Some ideas for bad things that are white/light:
snow storms, ice, frost on crops
some types of fungus/mold
corpses, ghosts, bones, a diseased person
clothing, skin tone, hair, etc. of a bad person
fur, teeth, eyes of an attacking animal/monster
bleached out deserts, dead trees, lifeless places
Some ideas for good things that are black/dark:
chocolate, truffles, wine, cooked meat
friendly animals/pets/creatures
a characterâs favorite vehicle, technology, coat, etc.
hair, skin tone, clothing, etc. of a good person
undisturbed water of a lake
the case/container of something important
valued wood, furniture, art
Think to burn, to infect, to bleach vs. to enrich, to protect, to be of substance.