The preview text in light themes is unreadable

[Jeaciaz]

• nvim --version: v0.7.0
• Operating system/version: macOS Catalina 10.15.7
• nvim +'checkhealth rnvimr':

  
  rnvimr: health#rnvimr#check
  ========================================================================
  ## OS
  - OK: Name: Mac

Ranger

• OK: Version: ranger 1.9.3

Python

• OK: Version: 3.9.13 (main, May 24 2022, 21:28:12) [Clang 12.0.0 (clang-1200.0.32.29)]

Pynvim

• OK: Version: 0.4.3

Ueberzug (optional)

• INFO: Ueberzug is not support for Mac

RPC

• OK: RPC echo: Neovim send "Give me five!" and receive "Give me five!"

  
  **Describe the bug**
  On a light theme, the text file preview colors are not adjusted, which results in white text which is very painful to read. I couldn't find the corresponding :hl group, neither am I sure there is one.

To Reproduce using nvim -u mini.vim Example: cat mini.vim

" use your plugin manager, here is `vim-plug`
call plug#begin('~/.config/nvim/plugged')
Plug 'kevinhwang91/rnvimr'
Plug 'ellisonleao/gruvbox.nvim'
colorscheme gruvbox
set background=light
let g:rnvimr_vanilla = 1
tnoremap <silent> <M-i> <C-\><C-n>:RnvimrResize<CR>
nnoremap <silent> <M-o> :RnvimrToggle<CR>
tnoremap <silent> <M-o> <C-\><C-n>:RnvimrToggle<CR>
call plug#end()

Steps to reproduce the behavior:

1. Create a .txt file with any contents;
2. Open Neovim with mini.vim provided above;
3. Hover over the .txt file from 1.;
4. See that all text is white and undiscernable.

Expected behavior A clear to read text using whatever theme the user prefers.

Screenshots

Additional context Add any other context about the problem here.

[kevinhwang91]

Depend on your previewer theme in ranger.

[Jeaciaz]

But in my terminal ranger it's all right, although colorless. Where does the color difference come from?

[kevinhwang91]

https://github.com/kevinhwang91/rnvimr/issues/67