Configure "day" theme colors independent of "night"?

[cerebrl]

Hello all,

I really like how tokyonight can auto-select the day theme when the terminal background color is "light" and night when the terminal bg is dark. I have successfully configured the colors for tokyonight in general, but I can't seem to independently configure night one way, and day the other.

Is there a way to do something akin to this (pseudocode'ish):

-- theme.lua
return {
  {
    "folke/tokyonight.nvim",
    opts = { -- or should this be `config`?
      on_colors = function(colors)
        if theme.name == "day" then
          colors.bg = "#FFFFFF"
        elseif theme.name == "night" then
          colors.bg = "#16161E"
        end
      end,
    },
  },
}

Or, if I could use the same detection that tokyonight does with detecting the terminal bg color and set the appropriate colors (pseudocode'ish):

-- theme.lua
return {
  {
    "folke/tokyonight.nvim",
    opts = { -- `config`?
      on_colors = function(colors)
        if vim.opts.background == "light" then
          colors.bg = "#FFFFFF"
        else
          colors.bg = "#16161E"
        end
      end,
    },
  },
}

I'm using a fairly standard installation of LazyVim if that makes a difference.

Thanks in advance for any help you can provide and thanks for providing such a wonderful theme <3