I’m sure you can find both frum men and women wearing just about ANY color (although various shades of black have been the “in” color at the fall and spring runway shows for men for the past several hundred years). Yes, you will find some niche chassidus wearing white bekeshes and knee sox but those seem to be an exception….in some other cases, the standard chassidishe lvush prescribes that only the rebbe is wearing white (or white stripes) but the masses are still dressed in standard penguin garb…