Black color
Its one of the most used colors  by both men and women.This color will expose your skin and it can be used for any occasions.
The black tshirts and the black shoes combo,even if the bottom wear changes,if you can come up with this combination..  its a boom fire hot streak.
Most people choose black because it can blend with any colors.
The grey lightens the impact of too much black .. but it works perfectly when we come up with a different color