Making highlight-sexp follow modus-themes-toggle

| elisp, emacs

[2023-01-27 Fri] Prot just added a modus-themes-get-color-value function. Yay! Also, it turns out that I need to update the overlay in all the buffers.

I'm experimenting with using the highlight-sexp minor mode to highlight my current s-expression, since I sometimes get confused about what I'm modifying with smartparens. The highlight-sexp background colour is hardcoded in the variable hl-sexp-background-color, and will probably look terrible if you use a light background. I wanted it to adapt when I use modus-themes-toggle. Here's how that works:

(use-package highlight-sexp
  (highlight-sexp :repo "daimrod/highlight-sexp" :fetcher github :version original)
  (emacs-lisp-mode . highlight-sexp-mode)
  (defun my-hl-sexp-update-overlay ()
    (when (overlayp hl-sexp-overlay)
         ,(if (fboundp 'modus-themes-get-color-value)
              (modus-themes-get-color-value 'bg-inactive)
  (defun my-hl-sexp-update-all-overlays ()
    (dolist (buf (buffer-list))
      (with-current-buffer buf
        (when highlight-sexp-mode
  (advice-add 'hl-sexp-create-overlay :after 'my-hl-sexp-update-overlay)
  (advice-add 'modus-themes-toggle :after 'my-hl-sexp-update-all-overlays))

This is what it looks like:

Figure 1: Animation of highlight-sexp toggling along with modus-themes-toggle
This is part of my Emacs configuration.
You can comment with Disqus or you can e-mail me at