Emacs color theme

下载颜色主题包并解压之：

$ wget http://download.savannah.gnu.org/releases/color-theme/color-theme-6.6.0.tar.gz
$ tar zxf ./color-theme-6.6.0.tar.gz

复制文件color-theme.el和目录themes/到~/.emacs.d/下面
编辑（没有则创建）~/.emacs文件，内容如下：

(add-to-list 'load-path "~/.emacs.d/")
(require 'color-theme)
(color-theme-initialize)
(color-theme-matrix)