Is this package listed in org-latex-default-packages-alist?
If so, you might try something like:
#+BEGIN_SRC emacs-lisp
(let ((org-latex-default-packages-alist org-latex-default-packages-alist))
(setf (nth (seq-position org-latex-default-packages-alist "color"
(lambda
Greetings.
When I export to Latex, org automatically creates the following line in
preamble:
\usepackage{color}
I would like to find a way to pass option [monochrome] to this
package. Adding another \usepackage creates a conflict. My preferred way
would be to add the line
\PassOptionsToPackag