`lualine_bg_color` doesn't work

[poperigby]

I have this for setting up dracula.nvim:

local dracula = require("dracula")

dracula.setup({
    transparent_bg = true,
    lualine_bg_color = "#44475a",
    overrides = {
        VertSplit = { fg = dracula.colors().selection },
    },
})

vim.cmd("colorscheme dracula")

I also have this for lualine:

require("lualine").setup({
    options = {
        icons_enabled = true,
        theme = "auto",
        component_separators = { left = "", right = "" },
        section_separators = { left = "", right = "" },
        disabled_filetypes = {},
        always_divide_middle = true,
    },
    sections = {
        lualine_a = { {
            "mode",
            color = { gui = "bold" },
        } },
        lualine_b = { "branch", { "diagnostics", sources = { "nvim_diagnostic" } } },
        lualine_c = { "filename" },
        lualine_x = { "fileformat", "filetype" },
        lualine_y = { "progress" },
        lualine_z = { "location" },
    },
    inactive_sections = {
        lualine_a = {},
        lualine_b = {},
        lualine_c = { "filename" },
        lualine_x = { "location" },
        lualine_y = {},
        lualine_z = {},
    },
    tabline = {},
    extensions = {},
})

lualine's background color isn't changing though.