Magit is an awesome and relatively easy to use git repository manager for Emacs. I was all about Tig (command line git repo manager) until I discovered this beauty and now happily stay inside of emacs throughout my daily development. It’s default diff colors are bad enough to make you run away from open-source as fast as you can, though. Here’s how to improve it so that it’s the standard red and green like every other diff tool:

;; change magit diff colors
(eval-after-load 'magit
     (set-face-foreground 'magit-diff-add "green3")
     (set-face-foreground 'magit-diff-del "red3")
     (when (not window-system)
       (set-face-background 'magit-item-highlight "black"))))