monochrome - A dark Emacs 24 theme for your focused hacking sessions
Just throw monochrome-theme.el into ~/.emacs.d and execute
M-x load-theme RET monochrome RET
or put in your init file
(load-theme 'monochrome t)
This theme is based on the builtin dichromacy theme, it is basically gray on black, except for errors and a few things.