I personally dont find this to be true, its not only resale value, this might apply to expensive things, but other more daily things like phones, phone covers,

I personally dont find this to be true, its not only resale value, this might apply to expensive things, but other more daily things like phones, phone covers, etc, always have black/white as the most selling color. This IMO is just a social change, people just like monochrome colors.