diff --git a/lisp/org-compat.el b/lisp/org-compat.el
index 4d9632035..eaa601ad8 100644
--- a/lisp/org-compat.el
+++ b/lisp/org-compat.el
@@ -704,8 +704,6 @@ This constant, for example, makes the below code not err:
   'org-latex-color-format 'org-latex-preview--format-color "9.7")
 (define-obsolete-function-alias
   'org-latex-color 'org-latex-preview--attr-color "9.7")
-(define-obsolete-function-alias
-  'org-normalize-color 'org-latex-preview--normalize-color "9.7")
 ;; MathML related functions from org-latex-preview.el
 (define-obsolete-variable-alias
   'org-latex-to-mathml-jar-file 'org-mathml-converter-jar-file "9.7")
@@ -760,6 +758,12 @@ This constant, for example, makes the below code not err:
 (make-obsolete
  'org-dvipng-color-format "to be removed" "9.7")
 
+;; FIXME: Unused; obsoleted; to be removed.
+(defun org-normalize-color (value)
+  "Return string to be used as color value for an RGB component."
+  (format "%g" (/ value 65535.0)))
+(make-obsolete 'org-normalize-color "to be removed" "9.7")
+
 ;; FIXME: Unused; obsoleted; to be removed.
 (defcustom org-preview-latex-image-directory "ltximg/"
   "Path to store latex preview images.
diff --git a/lisp/org-latex-preview.el b/lisp/org-latex-preview.el
index 6b6349133..07d712bd2 100644
--- a/lisp/org-latex-preview.el
+++ b/lisp/org-latex-preview.el
@@ -2397,14 +2397,11 @@ used it can be worth storing the results to avoid re-computing.")
   "Convert COLOR-NAME to a RGB color value."
   (or (alist-get color-name org-latex-preview--format-color-cache nil nil #'equal)
       (cdar (push (cons color-name
-                        (apply #'format "%s,%s,%s"
-                               (mapcar 'org-latex-preview--normalize-color
-                                       (color-values color-name))))
+                        (apply #'format "%.3f,%.3f,%.3f"
+                               (mapcar
+                                (lambda (v) (/ v 65535.0))
+                                (color-values color-name))))
                   org-latex-preview--format-color-cache))))
 
-(defun org-latex-preview--normalize-color (value)
-  "Return string to be used as color value for an RGB component."
-  (format "%g" (/ value 65535.0)))
-
 (provide 'org-latex-preview)
 ;;; org-latex-preview.el ends here