Org-mode strike-through color

Question

Strike-through texts (like this: +text+) in Org-mode are black by default. I want to make them gray. The problem is, I can't find the place to customize it. I've tried M=x describe-face, and the result is "default face", which is puzzling. Doesn't Org-mode have a place to configure the strike-through color?

Xanthine

What version of org-mode are you using? In my 7.9.1 strike +text+ don't change color, only a strike line appears. – Shoddy

Mine is 7.7. My point is, I want it to change color. – Xanthine

As far as I can tell from the docs, strike-through is not a face, but an attribute of the text/face which in this case is imposed on top of whatever face is in effect (like, default-face). In other words, you cannot customize it using customize face. – Biography

Answer 1

Customize the org-emphasis-alist variable with M-x customize-variable. Find the list entry where the "marker character" is + and choose the "Font-lock-face" option in the "Value menu" popup. Input the value of a face of your choosing, whose exact look you can customize the usual way, for example with M-x customize-face.

Or, more succinctly:

(require 'cl)   ; for delete*
(setq org-emphasis-alist
      (cons '("+" '(:strike-through t :foreground "gray"))
            (delete* "+" org-emphasis-alist :key 'car :test 'equal)))

Renwick

This answer is still relevant and works, but the cl package has been deprecated as of Emacs 27. Maybe an approach that doesn't depend on cl is to define a custom org-custom-strike-through face and apply it to the custom-set-variables under org-emphasis-alist. I can see that somewhat recently there is a patch for a defface on strike-through face in org-faces, but it's not been merged (idk, I might be mistaken)? source – Xmas

@Xmas cl is deprecated, but cl-lib is alive and well, and defines cl-delete which is the equivalent of delete*. Of course, you could do it without either, but it would be less elegant/succinct. – Renwick

Yep, that's true :) I just thought it would be a good idea to mention it, since I recently looked into what's happening with cl. – Xmas