While customizing Emacs this last weeks, I had the need to customize also the color theme.

Color themes are always a pain in the ass to edit, because you're supposed to read color strings like #aabbcc and guess what colors they represent.

This is why I wrote [[http://julien.danjou.info/rainbow-mode.html][rainbow-mode]], a minor mode for Emacs that will highlight strings that represents color, using the color they represent.

This support hexadecimal syntax, HTML color name, X color names and rgb() CSS syntax.

Screenshot of Emacs with rainbow-mode activated