During the day, the appearance of the habrahabr suits me 100%. But when you sit at 3 o'clock in the dark room, the white background and the general light motif load your eyes.
I offer a solution to the problem - the creation of two viewing modes. Habroden (today's appearance) and Habronoch .
Actually sketch Habronoch: ')
UPD: Obviously, the mode switching will be implemented by a simple CSS substitution (if you pass through all the mode-dependent images through it).