Here's my entry for the theme day. Unfortunately, I was short on time and ideas so I went through my archives and tried to fit something for the theme instead of going out and shooting something specific. In any case, I do think it shows contrast - there's light and shadows. The photo was taken at the Pi(e) Lounge inside Sal and Mookie's pizzaria.
To see more intrepretations of today's theme from around the world click here.