A white helmet (based on motorcycle accident data) is significantly safer than a black one in terms of motorists driving over a bicyclist, but this is seldom mentioned.
I’m not surprised!
Liberally using reflective 3M strips on helmets and other aspects of one’s bike, such as back of the rack, if present, seat post, under the seat bags (many come with reflective strips) is a good idea to make yourself very visible to motorists or motorcyclists late in the evening and nights.