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rainbow-delimiters.el:

Rainbow Delimiters is a “rainbow parentheses”-like mode which highlights parentheses, brackets, and braces according to their depth. Each successive level is highlighted in a different color. This makes it easy to spot matching delimiters, orient yourself in the code, and tell which statements are at a given depth.

Great care has been taken to make this mode fast. You shouldn’t see any change in scrolling or editing speed when it's on even when working in delimiter-rich languages like Clojure or Emacs Lisp. It can be used with any language, and can be enabled editor-wide.

You can customize the colors rainbow-delimiters uses. The default colors are intentionally subtle; they are unobtrusive enough to make the mode worth looking at even if you usually don’t like rainbow parentheses modes. A number of major color themes such as Zenburn and Solarized have added their own faces for the mode.

This is the official github repository for rainbow-delimiters.

The latest release of rainbow-delimiters.el is always found here:

Further information is available on the EmacsWiki page:

Installation instructions:

  1. Place rainbow-delimiters.el on your emacs load-path.

  2. Compile the file (necessary for speed):
    M-x byte-compile-file [location of rainbow-delimiters.el]

  3. Add the following to your dot-emacs/init file:
    (require 'rainbow-delimiters)

  4. Activate the mode in your init file.


You can choose to enable it only for specific modes, or Emacs-wide:
  • To enable it only in certain modes, add lines like the following:
    (add-hook 'clojure-mode-hook 'rainbow-delimiters-mode)

  • To enable it in all programming-related emacs modes (Emacs 24+):
    (add-hook 'prog-mode-hook 'rainbow-delimiters-mode)

  • To activate the mode globally, add to your init file:
    (global-rainbow-delimiters-mode)

  • To temporarily activate rainbow-delimiters mode in an open buffer:
    M-x rainbow-delimiters-mode

Additional discussion is at the top of the file and on the EmacsWiki page linked to above.

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