vim: improve color handling

vim/vimrc

@@ -5,11 +5,15 @@ source $DOTFILES/vim/plugs.vim
 set encoding=utf-8
 scriptencoding utf-8
 
-" Style
+"" Style
+" enable truecolor mode
+set termguicolors
 set background=dark
 let g:gruvbox_contrast_dark='hard'
 let g:gruvbox_sign_column='bg0'
 
+" Show some gui colors in term
+let g:gruvbox_guisp_fallback='bg'
 colorscheme gruvbox
 " enable truecolor support
 set termguicolors