Why doesn't lazy.nvim load PaperColor theme correctly?

[tupos]

I try to migrate to lua config and with the following configuration lazy.nvim does not load paper color colortheme

local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
if not (vim.uv or vim.loop).fs_stat(lazypath) then
  local lazyrepo = "https://github.com/folke/lazy.nvim.git"
  local out = vim.fn.system({ "git", "clone", "--filter=blob:none", "--branch=stable", lazyrepo, lazypath })
  if vim.v.shell_error ~= 0 then
    vim.api.nvim_echo({
      { "Failed to clone lazy.nvim:\n", "ErrorMsg" },
      { out, "WarningMsg" },
      { "\nPress any key to exit..." },
    }, true, {})
    vim.fn.getchar()
    os.exit(1)
  end
end
vim.opt.rtp:prepend(lazypath)

vim.g.mapleader = "\\"
vim.g.maplocalleader = "\\"

local papercolor = {
    'NLKNguyen/papercolor-theme',
    lazy = false,
    priority = 1000,
    config = function()
        vim.cmd.colorscheme('PaperColor')
        vim.o.background = 'light'
    end
}
require("lazy").setup({
    spec = {
        papercolor,
    },
})

If I move vim.cmd.colorscheme('PaperColor') and vim.o.background = 'light' the to the very end of the config, the colorscheme works.

[iton0]

this should work

local papercolor = {
    'NLKNguyen/papercolor-theme',
    lazy = false,
    priority = 1000,
    config = function()
	vim.opt.termguicolors = true
        vim.cmd.colorscheme('PaperColor')
        vim.o.background = 'light'
    end
}