How to change background color of the text of hover window?

Question

I have such binding that opens the hover window

vim.keymap.set('n', 'K', vim.lsp.buf.hover, bufopts)

As you can see the background color of the let name2: {unknown} is white (#ffffff). I would like to make it transparent

How can I change the background color of the text?

P.S. I use Lua as a configuration language

Answer 1

That should be controlled by the NormalFloat highlight group. I have the following setting in Lua to make it "transparent" (same color as the buffer background):

local set_hl_for_floating_window = function()
  vim.api.nvim_set_hl(0, 'NormalFloat', {
    link = 'Normal',
  })
  vim.api.nvim_set_hl(0, 'FloatBorder', {
    bg = 'none',
  })
end

set_hl_for_floating_window()

vim.api.nvim_create_autocmd('ColorScheme', {
  pattern = '*',
  desc = 'Avoid overwritten by loading color schemes later',
  callback = set_hl_for_floating_window,
})