Consider the following quarto document:

---
title: "Some title"
author: X
date: "2022"
format: 
  pdf:
   number-sections: true
   fontsize: 12 pt
   papersize: A4
   fig-pos: 'H'
   geometry: "left=2.54cm,right=2.54cm,top=2.54cm,bottom=2.54cm"
   include-in-header:
     text: |
       \usepackage[font=small]{caption}
       \usepackage{float}
       \usepackage[table]{xcolor}

engine: jupyter
jupyter: r-reticulate
---

\begin{center}
\begin{tabular}{|c|c|}
\hline 
1 & 2\tabularnewline
\hline 
\cellcolor{blue} 3 & \cellcolor{red} 4\tabularnewline
\hline 
\end{tabular}
\end{center}

I get the following error, when rendering it:

LaTeX Error: Option clash for package xcolor.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.83 \KOMAoption
                {captions}{tableheading} 

A solution that works is to add table to the following line of the tex file generated by quarto:

\PassOptionsToPackage{dvipsnames,svgnames,x11names}{xcolor}

That is:

\PassOptionsToPackage{dvipsnames,svgnames,x11names, table}{xcolor}

My question is: How can I do that from inside the quarto document instead of hacking the tex file?

>Solution :

As explained in this answer on Tex StackExchange, one possible solution could be passing table as a classoption and you do not need to declare using xcolor explicitly since it is used by-default.

---
title: "Some title"
author: X
date: "2022"
format: 
  pdf:
   number-sections: true
   fontsize: 12 pt
   papersize: A4
   fig-pos: 'H'
   geometry: "left=2.54cm,right=2.54cm,top=2.54cm,bottom=2.54cm"
   classoption: table
   include-in-header:
     text: |
       \usepackage[font=small]{caption}
       \usepackage{float}
---

\begin{center}
\begin{tabular}{|c|c|}
\hline 
1 & 2\tabularnewline
\hline 
\cellcolor{blue} 3 & \cellcolor{red} 4\tabularnewline
\hline 
\end{tabular}
\end{center}

---

---