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This article is some "theming guide" about customizing the look and feel of an Org-Babel buffer inside Emacs. We'll show you how you can improve the appearance of source code blocks.


Screenshot for the Leuven theme (light theme, i.e. with a white background):


To configure "native fontification" (as in the above screenshot), set the following in your =.emacs= file:

;; fontify code in code blocks (setq org-src-fontify-natively t)

Configuration File

  • To get the above full contributed theme, please visit [[file:../../../][Installing Org Color
  • themes]] and copy the file [[][color-theme-leuven.el]] in your =load-path=.
  • If you want to keep your existing Emacs color theme, and you only want to
  • customize the "delimiter lines" of the code blocks, either:
  • Add the following lines to your current color theme:

#+begin_src emacs-lisp (org-block-begin-line ((t (:underline "#A7A6AA" :foreground "#008ED1" :background "#EAEAFF")))) (org-block-background ((t (:background "#FFFFEA")))) (org-block-end-line ((t (:overline "#A7A6AA" :foreground "#008ED1" :background "#EAEAFF")))) #+end_src

  • Define these faces, in your =.emacs= file, before requiring Org (if you
  • don't have your own color theme):

#+begin_src emacs-lisp (defface org-block-begin-line '((t (:underline "#A7A6AA" :foreground "#008ED1" :background "#EAEAFF"))) "Face used for the line delimiting the begin of source blocks.")

(defface org-block-background '((t (:background "#FFFFEA"))) "Face used for the source block background.")

(defface org-block-end-line '((t (:overline "#A7A6AA" :foreground "#008ED1" :background "#EAEAFF"))) "Face used for the line delimiting the end of source blocks.") #+end_src

Further extensions

When we will have some spare time, our intention is to get the reserved keywords of Org-Babel (such as :var and :exports) somehow highlighted. Stay tuned -- or give some help!