How can I fix a missing color in emacs? I used homebrew to install emacs, replacing an older version of unknown provenance. At startup emacs complains Unable to load color "dark cyan" and some text in my elisp files is invisible: I see (require '   ) instead of (require 'foo).

There don't seem to be any references to dark cyan in my .emacs.d/ files, so I think dark cyan must be part of the default scheme. How can I fix this?
After banging my head against the wall for a while, I found http://permalink.gmane.org/gmane.emacs.macintosh.osx/6639


  Delete this file:
  
  ~/Library/Colors/Emacs.clr
  
  and dark cyan should come back.


So I quit emacs, moved that file to ~/Library/Colors/Emacs.clr-, started emacs again... and it worked. I hope this fix is useful to someone else.