local function set_transparent()
  vim.cmd('highlight BufferTabpageFill guibg=None cterm=NONE')
  vim.cmd('highlight BufferInactive guibg=None cterm=NONE')

  vim.cmd('highlight BufferInactiveSign guibg=None') -- Tab seperator / indicator?
  vim.cmd('highlight BufferVisibleSign guibg=None') -- Tab seperator / indicator?
end

-- run after plugins/themes
vim.api.nvim_create_autocmd({ "VimEnter" }, {
  callback = set_transparent,
})