add comment highlight visibility function

init.vim

@@ -173,6 +173,21 @@ function! AleLinterStatus() abort "{{{
     \)
 endfunction
 "}}}
+function! ToggleHighlights() abort "{{{
+	if ! exists('b:toggle_highlights_state')
+		" state 1 is normal, state 0 is faded
+		let b:toggle_highlights_state = 1
+	else
+		let b:toggle_highlights_state = ! b:toggle_highlights_state
+	endif
+
+	if b:toggle_highlights_state == 1
+		hi Comment guifg=#9d9d9d
+	else
+		hi Comment guifg=#d6d6d6
+	endif
+endfunction
+"}}}
 "----------------------------------------------------------------------------}}}
 "#commands{{{
 "   TrimWhitespace{{{
@@ -333,6 +348,7 @@ nnoremap <silent> <cr>s :syntax on<cr>
 nnoremap <silent> <cr>S :syntax off<cr>
 "   miscallaneous {{{
 nnoremap <cr>l :colorscheme paper-custom<cr>
+nnoremap <cr>c :call ToggleHighlights()<cr>
 nnoremap <cr>d :colorscheme monotonous-dark<cr>
 nnoremap 0 ^
 nnoremap <silent><space>cs :let @/=""<cr>