yeah. black colour tends to 'smallen' things. it has something to do with optical illusions. easy example is u wear black shirt. that way the colour makes u a bit thinner than u actually are.

going back to this white colour. wise? it depends on what sort of car to be painted white.

for example a kancil with white paint = nothing good +it just some car. a mazda 6 with white = gorgeous. a yellow on new honda city = yucks. brown on a bus = abnoxious. blue on a scooby = perfect n made in heaven stuff because its just the colour it suits best. pink on ANY CAR = u are a GAY. lol.

maintenance wise, whites and blacks need extra care compare to lets say a silver. or a light blue.