Gt_highlight_cols produces wrong colorcodes for Latex

[VCoutolleau]

First of all, thank you really much for your very useful package !

I faced an issue regarding gt_highlight_cols : it produces wrong colorcodes for LateX as shown in the following reprex.

---
title: "Reprex"
format: pdf
editor: visual
---

```{r}
library(gt)
library(gtExtras)

# Define the start and end dates for the data range
start_date <- "2010-06-07"
end_date <- "2010-06-14"

# Create a gt table based on preprocessed
# `sp500` table data
sp500 |>
  dplyr::filter(date >= start_date & date <= end_date) |>
  dplyr::select(-adj_close) |>
  gt() |>
  tab_header(
    title = "S&P 500",
    subtitle = glue::glue("{start_date} to {end_date}")
  ) |>
  fmt_currency() |>
  fmt_date(columns = date, date_style = "wd_m_day_year") |>
  fmt_number(columns = volume, suffixing = TRUE)|>
  gt_highlight_cols("open", alpha= 0.7, fill="#A9A9A9")
  

If my understanding is right, rendering in PDF fails because colorscode with alpha are replaced by a rgba function that LateX cannot process. For instance, the first line of the gt is turned into :

Mon, Jun 14, 2010 & {\mdseries \cellcolor[HTML]{rgba(169,169,169,0.7)}{\textcolor[HTML]{000000}{\$1,095.00}}} & \$1,105.91 & \$1,089.03 & \$1,089.63 & 4.43B \\ 

It can be fixed if replaced with a similar HEX code, for instance "#C0C0C0". The following reprex works fine :

---
title: "Reprex"
format: pdf
editor: visual
---

```{r}
library(gt)
library(gtExtras)

# Define the start and end dates for the data range
start_date <- "2010-06-07"
end_date <- "2010-06-14"

# Create a gt table based on preprocessed
# `sp500` table data
sp500 |>
  dplyr::filter(date >= start_date & date <= end_date) |>
  dplyr::select(-adj_close) |>
  gt() |>
  tab_header(
    title = "S&P 500",
    subtitle = glue::glue("{start_date} to {end_date}")
  ) |>
  fmt_currency() |>
  fmt_date(columns = date, date_style = "wd_m_day_year") |>
  fmt_number(columns = volume, suffixing = TRUE)|>
  gt_highlight_cols("open", fill="#C0C0C0")  

I hope it helps and it isn't redudant with another issue.