Emacs is my favorite editor, however the default color theme comes from emacs (Aquamacs) is not eye friendly, if you have to stare at it for a long time. A gallery of emacs color themes can be found from here http://gnuemacscolorthemetest.googlecode.com/svn/html/index-el.html, where I found Alato Light theme by Jari Aalto is nice theme for my eyes. Adding the following code to the .emacs file makes it the default color theme when emacs starts.
;; Set my favorite color theme
To try it yourself before setting it as the default theme, you can do the following from emacs:
, then select Aalto Light.