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How can I control the background color of my LaTex fragments in Org-mode?

I am using the badwolf-theme package, and this is what I get:

enter image description here

I would like the background color of my formulas to match the background color of my org buffer.

Here are my current org-format-latex-options:

enter image description here

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  • 2
    Have you tried tweaking org-format-latex-options?
    – JeanPierre
    May 28, 2016 at 20:03
  • @JeanPierre I updated the OP. Background seems to be set to default. Not sure if there is a different option to control this.
    – Amelio Vazquez-Reina
    May 29, 2016 at 0:04
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    Maybe try setting it to auto?
    – JeanPierre
    May 29, 2016 at 7:34
  • This works for me with the default value of org-format-latex-options, which are the same as yours. Maybe something in the badwolf-theme causes the problem?
    – Tyler
    Jun 1, 2016 at 13:09

4 Answers 4

Reset to default
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I've had this problem before, sometimes deleting the ltximg folder helps reset things from the previous theme.

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  • in case anyone doesn‘t know where to look, the ltximg files are in „~/.emacs.d/.local/cache/org-latex“
    – pfincent
    Oct 20, 2021 at 10:58
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    @pfincent be aware that the folder for the ltximg-files is configured by the variable org-latex-preview-ltxpng-directory; depending on the user's configuration, this variable might also point to some other place.
    – ben
    Oct 21, 2021 at 14:50
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I had a similar issue (in my case it was the foreground-setting that I couldn't control appropriately). I was able to fix it by employing xcolor in the conversion process.

Put this in your init.el and execute it by pressing C-M-x or by restarting emacs:

;; fix color handling in org-preview-latex-fragment
(let ((dvipng--plist (alist-get 'dvipng org-preview-latex-process-alist)))
  (plist-put dvipng--plist :use-xcolor t)
  (plist-put dvipng--plist :image-converter '("dvipng -D %D -T tight -o %O %f")))

Then simply recreate your images (delete the folder ltximg).

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  • I get the error: „void-variable org-preview-latex-process-alist“
    – pfincent
    Oct 20, 2021 at 11:07
  • Hi @pfincent, how did you execute the expression that I suggested - in init.el or manually with C-M-x? In init.el, please try to wrap my expression inside a (with-eval-after-load 'org <my-code-here>)-statement. Maybe org has not been loaded yet when the code in your init.el is executed. Or, simply execute my expression manually (C-M-x), after you've opened an org-document. Does this fix your issue?
    – ben
    Oct 21, 2021 at 12:40
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There is now a solution to this in later versions of org-mode: https://www.mail-archive.com/[email protected]/msg130709.html

To get true transparent backgrounds in the generated fragments, set

(plist-put org-format-latex-options :background "Transparent")
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0

I would try changing the :background from default to "Black"

Somehow my :foreground default got changed from white to black and it was really annoying. Note that it's expecting a stringp so quotes are needed. You might be able to put hex string in there. Haven't tried myself.

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