When I changed the default theme I saw someone say I should name the classic theme "AMOLED". Apparently, the theme was so dark to a lot of people that it appeared black! I guess my designer's eye and working on photon for over a year made me not notice this.

The classic theme uses a very dark gray for the main background, and an even darker gray for the sides. There was never any black, except in very very early versions of Photon.