How to color element of text in RMarkdown for a pdf file

Question

I am trying to color in red a part of a text for a pdf file

---
output: pdf_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```


## *Title*


Text <p style="color:red">text to color </p>

Unfortunately, this does not return the wanted output.I have read a post, suggesting to use this function I reported below the way I arranged it (source: Specifying transparent color in HTML and PDF output),

---
output: pdf_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```


```{r colFmt}
colFmt = function(x,color){
  outputFormat = opts_knit$get("rmarkdown.pandoc.to")
  if(outputFormat == 'latex')
    paste("\\textcolor[HTML]{",color,"}{",x,"}",sep="")
  else if(outputFormat == 'html')
    paste("<font color='",color,"'>",x,"</font>",sep="")
  else
    x
}
```

text `r colFmt("text to color",hex_color)` 

but since it does not return the wanted output I am quite confused on how this should be used.

Can anyone provde some help? Thanks

Answer 1

Using latex to style pdf

---
title: "Untitled"
output:
  pdf_document: default
date: "2023-09-23"
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)



\textcolor{red}{text to color}