How to make a transparent background?

[gitttyyy]

I want something like this(in neovide)

in terminal just like this

I find #969 that set this
vim.opt.pumblend = 0 but not help me

now my config here

      -- vim.api.nvim_set_hl(0, "PopMenu", { bg = "#1F2335", blend = 0 })
      vim.opt.pumblend = 0
      local win_opt = {
        border = "single",
        col_offset = 0,
        side_padding = 1,
        -- winhighlight = "Normal:PopMenu,",
      }

      local doc_opt = {
        col_offset = 0,
        side_padding = 1,
        winhighlight = "Normal:PopMenu,FloatBorder:FloatBorder,CursorLine:Visual,Search:None",
      }
      opts.window = {
        completion = cmp.config.window.bordered(win_opt),
        documentation = cmp.config.window.bordered(doc_opt),
      }

[gitttyyy]

solved with 2700