Conceal code_block and dim

[jghauser]

I have the following in my config:

    ["core.norg.concealer"] = {
      config = {
        dim_code_blocks = {
          conceal = true,
          content_only = false,
          -- enabled = true,
          padding = { left = 1, right = 1 },
          width = "content", -- Default is "fullwidth"
        },
      },
    }, -- Allows for use of icons

which gives me this:

Is it possible to have the background of the @code and @end to be dimmed (as it is when using conceal = false)?
With conceal = false:

Note that I also have defined a highlight group for the codeblock because I have an oled screen with full black background:

          tags = {
            ranged_verbatim = {
              code_block = "+NeorgCustomCodeBlock",
            },
          },

Not sure if that affects anything.

Thanks!