Would like to use xterm_palette in custom parser for LS_COLORS

[MartenBE]

I currently have the following in my config:

vim.pack.add({ "https://github.com/catgoose/nvim-colorizer.lua" })

-- TODO: https://github.com/catgoose/nvim-colorizer.lua/issues/212
-- https://github.com/catgoose/nvim-colorizer.lua/blob/5cfe7fffbd01e17b3c1e14af85d5febdef88bd8c/lua/colorizer/parser/xterm.lua#L13
local create_xterm_palette = function()
    local xterm_palette = {
        "000000",
        "800000",
        "008000",
        "808000",
        "000080",
        "800080",
        "008080",
        "c0c0c0",
        "808080",
        "ff0000",
        "00ff00",
        "ffff00",
        "0000ff",
        "ff00ff",
        "00ffff",
        "ffffff",
        -- 16-231: 6x6x6 color cube
    }

    -- Fill in the 6x6x6 color cube
    for r = 0, 5 do
        for g = 0, 5 do
            for b = 0, 5 do
                local idx = 16 + 36 * r + 6 * g + b
                local function scale(x)
                    return x == 0 and 0 or 95 + 40 * (x - 1)
                end
                xterm_palette[idx + 1] = string.format("%02x%02x%02x", scale(r), scale(g), scale(b))
            end
        end
    end

    -- 232-255: grayscale ramp
    for i = 0, 23 do
        local level = 8 + i * 10
        xterm_palette[233 + i] = string.format("%02x%02x%02x", level, level, level)
    end

    return xterm_palette
end

local xterm_palette = create_xterm_palette()

require("colorizer").setup({
    options = {
        parsers = {
            -- ...
            custom = {
                {
                    name = "ls_colors",
                    prefixes = { "=0", "=1", "=2", "=3", "=4", "=5", "=6", "=7", "=8", "=9" }, -- Does not allow for a regex, so we need to specify all possible prefixes
                    parse = function(ctx)
                        local full_match, color_match = ctx.line:match("(=[%d;]*[34]8;5;(%d+):)", ctx.col)
                        if full_match and color_match then
                            local hex = xterm_palette[tonumber(color_match) + 1]
                            return #full_match, hex
                        end
                    end,
                },
            },
        },
    },
})

This works, but I was wondering if it would be possible to use xterm_palette from within the plugin instead of copy pasting it here in my config?