Have you ever wondered why planes are white colour . Why not red,blue or green let us understand why. The colour white absorbs the least amount of heat and  the plane remains cold. This is also why  mid western people wear white second reason is defect can be easily noticed on white colour which makes it easier to solve them. Third the most interesting reason is that it takes nearly 2 crore rupees to paint a plane. And white colour fades less. Which is why plane remains coloured for a long time this is why it is the most cost efficient colour.