This function takes a character vector of color names/codes and returns a
character vector of hex colours. It uses the get_fp_colour function to
convert each color name/code to its corresponding hex colour. The input can
include predefined color names like "rl_green", "rl_red", etc., as well as
hex color codes or valid R color names. Use of get_fp_colors is valid too.
Examples
get_fp_colours(c("rl_green", "#FF0000", "blue"))
#> [1] "#00a651" "#FF0000" "blue"
get_fp_colours("rl_green")
#> [1] "#00a651"
get_fp_colors("rl_green")
#> [1] "#00a651"
