Airline text color changes when sourcing the .vimrc

According to gruvbox's readme the airline text color should be black, for some reason I've got it white, although when I source the .vimrc without changing anything the text color changes to black, which seems to be the correct.

If I close and open vim it turns white again.

My .vimrc

#! vim:ff=unix:fileencoding=utf-8:foldmethod=marker
if filereadable("/etc/vim/vimrc.local")
  source /etc/vim/vimrc.local
endif

set noerrorbells
set nocompatible
set ttyfast
set foldmethod=manual
set number relativenumber
set ru
set encoding=utf-8
set fileencoding=utf-8
set clipboard=unnamedplus
set background=dark
set showcmd
set ttymouse=sgr
set scrolloff=0
set t_Co=256
set nowrap
set nobackup
set noswapfile
set undodir=~/.vim/undodir
set undofile
set splitright
set splitbelow
"set ff=unix

": Lenguajes{{{
let g:xml_syntax_folding=1

autocmd FileType html setlocal shiftwidth=2 tabstop=2
autocmd FileType htmldjango setlocal shiftwidth=2 tabstop=2
autocmd FileType javascript setlocal shiftwidth=2 tabstop=2 softtabstop=0 expandtab smarttab
autocmd FileType typescript setlocal shiftwidth=4 tabstop=4 softtabstop=0 expandtab smarttab
autocmd FileType vue setlocal shiftwidth=4 tabstop=4 softtabstop=0 expandtab smarttab
autocmd Filetype xml setlocal foldmethod=syntax

autocmd BufNewFile,BufRead *.py
    \ set wrap
    \ textwidth=79
    \ colorcolumn=+1
    \ linebreak
    \ display+=lastline
    \ foldmethod=indent
    \ foldlevel=99

" }}}

" Plugins{{{
call plug#begin('~/.vim/plugged')

Plug 'morhetz/gruvbox'
Plug 'adelarsq/vim-matchit'
Plug 'tpope/vim-surround'
Plug 'mattn/emmet-vim'
Plug 'vim-airline/vim-airline'
Plug 'preservim/tagbar'
Plug 'godlygeek/tabular'
Plug 'tpope/vim-fugitive'
Plug 'mbbill/undotree'
Plug 'ctrlpvim/ctrlp.vim'

Plug 'vim/killersheep'
Plug 'tpope/vim-capslock'

call plug#end()
"}}}

colorscheme gruvbox
hi Normal guibg=NONE ctermbg=NONE

let g:netrw_liststyle=3
let g:netrw_banner=0
let g:netrw_browse_split=2
let g:netrw_winsize=25

let g:airline#extensions#tagbar#enabled=1
let g:airline#extensions#tagbar#flags='f'
let g:airline_theme='gruvbox'

let g:ctrlp_user_command = ['.git/', 'git --git-dir=%s/.git ls-files -oc --exclude-standard']
let mapleader = " "

": Remaps{{{
imap jk <Esc>
imap JK <Esc>
nmap ñ ^
nmap <silent> <F7> :TagbarToggle<CR>
nmap <silent> <F8> :call ToggleNetrw()<CR>
nnoremap ZZ <nop>

nnoremap <leader>h :wincmd h<CR>
nnoremap <leader>j :wincmd j<CR>
nnoremap <leader>k :wincmd k<CR>
nnoremap <leader>l :wincmd l<CR>
nnoremap <leader>u :UndotreeToggle<CR>

"}}}

augroup numbertoggle
  autocmd!
  autocmd BufEnter,WinEnter,FocusGained,InsertLeave * set relativenumber
  autocmd BufLeave,WinLeave,FocusLost,InsertEnter * set norelativenumber
augroup END

let g:NetrwIsOpen=0

function! ToggleNetrw()
    if g:NetrwIsOpen
        let i = bufnr("$")
        while (i >= 1)
            if (getbufvar(i, "&filetype") == "netrw")
                silent exe "bwipeout " . i
            endif
            let i-=1
        endwhile
        let g:NetrwIsOpen=0
    else
        let g:NetrwIsOpen=1
        silent Lexplore
    endif
endfunction

morhetz / gruvbox

Airline text color changes when sourcing the .vimrc #424