My Gosh. You guys are judging on a snapshot that you're visualizing thru your lcd monitor. The setting you see is intended to read in complete dark
With apps like FBReader or CoolReader you change color in three seconds and the brightness with a simple slide up/down. When I'm on a bus or in the underground I use white fonts.
For those who don't know: in amoled diplays the 'black' = diodes turned off, this means that you have (almost) no light emitted from the background.