The man in the grey suit does not have a shadow, he is in the middle between black and white, uncertain of which side to favor. He doesn't have a shadow and the grey kind of represents this. He was extremely wise from his age, maybe why he was neutral.
Watch a group of seniors do their own old-school version of the 2014 hit song "Uptown Funk." The video titled, "Uptown Funk 'Oldtown Cover,'" featuring Alex Boye and The Dancing Grannies, lends credence to the saying, "You are only as old as you feel.