diff --git a/hm-imports/nvim/config/lua/dark_notify.lua b/hm-imports/nvim/config/lua/dark_notify.lua
new file mode 100644
index 00000000..380ca195
--- /dev/null
+++ b/hm-imports/nvim/config/lua/dark_notify.lua
@@ -0,0 +1,210 @@
+-- http://lua-users.org/wiki/StringTrim
+function trim6(s)
+  return s:match '^()%s*$' and '' or s:match '^%s*(.*%S)'
+end
+
+-- from norcalli/nvim_utils
+function nvim_create_augroups(definitions)
+  for group_name, definition in pairs(definitions) do
+    vim.api.nvim_command('augroup ' .. group_name)
+    vim.api.nvim_command('autocmd!')
+    for _, def in ipairs(definition) do
+      -- if type(def) == 'table' and type(def[#def]) == 'function' then
+      -- 	def[#def] = lua_callback(def[#def])
+      -- end
+      local command = table.concat(vim.tbl_flatten { 'autocmd', def }, ' ')
+      vim.api.nvim_command(command)
+    end
+    vim.api.nvim_command('augroup END')
+  end
+end
+
+local state = {
+  initialized = false,
+  pid = -1,
+  stdin_handle = nil,
+  config = {},
+}
+
+local M = {}
+
+local function ensure_config()
+  if state.config == nil then
+    state.config = {}
+  end
+end
+
+local function get_config()
+  ensure_config()
+  return state.config
+end
+
+local function edit_config(fn)
+  ensure_config()
+  fn(state.config)
+end
+
+local function apply_mode(mode)
+  local config = get_config()
+  local sel = config.schemes[mode] or {}
+  local colorscheme = sel.colorscheme or nil
+  local bg = sel.background or mode
+  local lualineTheme = sel.lualine or nil
+
+  vim.api.nvim_command('set background=' .. bg)
+  if colorscheme ~= nil then
+    vim.api.nvim_command('colorscheme ' .. colorscheme)
+  end
+
+  require('lualine').setup { options = { theme = lualineTheme } }
+
+  if config.onchange ~= nil then
+    config.onchange(mode)
+  end
+
+  state.current_mode = mode
+end
+
+function M.update()
+  local mode = vim.fn.system('dark-notify --exit')
+  mode = trim6(mode)
+  apply_mode(mode)
+end
+
+function M.set_mode(mode)
+  mode = trim6(mode)
+  if not (mode == "light" or mode == "dark") then
+    error("mode must be either \"light\" or \"dark\"" .. mode)
+    return
+  end
+  apply_mode(mode)
+end
+
+function M.toggle()
+  local mode = state.current_mode
+  if mode == "light" then
+    mode = "dark"
+  elseif mode == "dark" then
+    mode = "light"
+  else
+    M.update()
+    return
+  end
+  apply_mode(mode)
+end
+
+local function init_dark_notify()
+  -- Docs on this vim.loop stuff: https://github.com/luvit/luv
+
+  local handle, pid
+  local stdout = vim.loop.new_pipe(false)
+  local stdin = vim.loop.new_pipe(false)
+
+  local function onexit()
+    vim.loop.close(handle, vim.schedule_wrap(function()
+      vim.loop.shutdown(stdout)
+      vim.loop.shutdown(stdin)
+      state.initialized = false
+      state.pid = nil
+      state.stdin_handle = nil
+    end))
+  end
+
+  local function onread(err, chunk)
+    assert(not err, err)
+    if (chunk) then
+      local mode = trim6(chunk)
+      if not (mode == "light" or mode == "dark") then
+        error("dark-notify output not expected: " .. chunk)
+        return
+      end
+      apply_mode(mode)
+    end
+  end
+
+  handle, pid = vim.loop.spawn(
+    "dark-notify",
+    { stdio = { stdin, stdout, nil } },
+    vim.schedule_wrap(onexit)
+  )
+
+  vim.loop.read_start(stdout, vim.schedule_wrap(onread))
+
+  state.initialized = true
+  state.pid = pid
+  state.stdin_handle = stdin
+
+  -- For whatever reason, nvim isn't killing child processes properly on exit
+  -- So if you don't do this, you get zombie dark-notify processes hanging about.
+  nvim_create_augroups({
+    DarkNotifyKillChildProcess = {
+      { "VimLeave", "*", "lua require('dark_notify').stop()" },
+    }
+  })
+end
+
+-- For whatever reason, killing the child process doesn't work, at all. So we
+-- send it the line "quit\n", and it kills itself.
+function M.stop()
+  if state.stdin_handle == nil then
+    return
+  end
+  vim.loop.write(state.stdin_handle, "quit\n")
+  -- process quits itself, calls onexit
+  -- config gets edited from there
+end
+
+function M.configure(config)
+  if config == nil then
+    return
+  end
+  local lightline_loaders = config.lightline_loaders or {}
+  local schemes = config.schemes or {}
+  local onchange = config.onchange
+
+  for _, mode in pairs({ "light", "dark" }) do
+    if type(schemes[mode]) == "string" then
+      schemes[mode] = { colorscheme = schemes[mode] }
+    end
+  end
+
+  edit_config(function(conf)
+    conf.lightline_loaders = lightline_loaders
+    conf.schemes = schemes
+    conf.onchange = onchange
+  end)
+end
+
+function M.run(config)
+  if config ~= nil or get_config().schemes == nil then
+    -- if it's nil, it's a first run, so configure with no options.
+    config = config or {}
+    M.configure(config)
+  end
+
+  local config = get_config()
+  if not config.initialized then
+    -- first run on startup, also happens to apply current mode
+    init_dark_notify()
+  elseif state.current_mode ~= nil then
+    -- we have run it before, but we're updating the settings
+    -- so don't reset to system, but do apply changed config.
+    local mode = state.current_mode
+    apply_mode(mode)
+  end
+end
+
+return M
+
+-- init.lua or init.vim in a lua <<EOF
+-- require('dark_notify').run({
+--  lightline_loaders = {
+--    my_colorscheme = "path_to_my_colorscheme's lightline autoload file"
+--  },
+--  schemes = {
+--    dark  = "dark colorscheme name",
+--    light = { colorscheme = "light scheme name", background = "optional override, either light or dark" }
+--  },
+--  onchange = function(mode)
+--  end,
+-- })
diff --git a/hm-imports/nvim/config/nvim.lua b/hm-imports/nvim/config/nvim.lua
index 549349f4..4929caa8 100644
--- a/hm-imports/nvim/config/nvim.lua
+++ b/hm-imports/nvim/config/nvim.lua
@@ -13,8 +13,26 @@ vim.g.maplocalleader = ','
 -- color stuff
 opt.termguicolors = true -- 24bit color
 require('gruvbox').setup({})
+require('tokyonight').setup({})
 opt.background = 'dark' -- dark gruvbox
 vim.cmd ':colorscheme gruvbox'
+require('dark_notify').run({
+  schemes = {
+    light = {
+      colorscheme = 'tokyonight',
+      background = 'light',
+      lualine = 'tokyonight'
+    },
+    dark = {
+      colorscheme = 'gruvbox',
+      background = 'dark',
+      lualine = 'gruvbox'
+    }
+  },
+})
+
+
+
 --vimspector
 vim.g.vimspector_base_dir = vim.env.HOME .. "/.local/share/nvim/vimspector"
 vim.g.vimspector_enable_mappings = "HUMAN"
@@ -24,10 +42,10 @@ vim.g.copilot_no_tab_map = true
 opt.encoding = 'utf-8'
 opt.number = true
 opt.relativenumber = true
-opt.undofile = true               -- save undo chages even after computer restart
-opt.showcmd = true                -- show (partial) command in status line
-opt.showmatch = true              -- show match brackets
-opt.wildmenu = true               -- visual autocomplete for command menu
+opt.undofile = true  -- save undo chages even after computer restart
+opt.showcmd = true   -- show (partial) command in status line
+opt.showmatch = true -- show match brackets
+opt.wildmenu = true  -- visual autocomplete for command menu
 -- Splits open at the bottom and right, which is non-retarded, unlike vim defaults.
 opt.splitbelow = true
 opt.splitright = true
diff --git a/hm-imports/nvim/default.nix b/hm-imports/nvim/default.nix
index 2b14baf5..75d97597 100644
--- a/hm-imports/nvim/default.nix
+++ b/hm-imports/nvim/default.nix
@@ -83,6 +83,7 @@ in
             vim-tmux-navigator # tmux
             nnn-nvim # nnn as filebrowser
             gruvbox-nvim # theme
+            tokyonight-nvim # light theme
             # complete ui overhaul
             notify-nvim
             nui-nvim
diff --git a/hm-imports/tmux/default.nix b/hm-imports/tmux/default.nix
index 9dc95a05..42a69aee 100644
--- a/hm-imports/tmux/default.nix
+++ b/hm-imports/tmux/default.nix
@@ -6,7 +6,6 @@
     historyLimit = 10000;
     plugins = with pkgs.tmuxPlugins; [
       vim-tmux-navigator
-      gruvbox
     ];
     extraConfig = ''
       set -sg escape-time 0 # makes vim esc usable
@@ -17,6 +16,8 @@
       bind c new-window -c "#{pane_current_path}"
       set-option -g default-terminal "tmux-256color"
       set -as terminal-overrides ',xterm*:Tc:sitm=\E[3m'
+      run-shell -b '~/.config/tmux-switch-colors/start_theme_switcher.sh'
     '';
   };
+  home.file.".config/tmux-switch-colors".source = ./tmux-switch-colors;
 }
diff --git a/hm-imports/tmux/tmux-switch-colors/dark.tmux b/hm-imports/tmux/tmux-switch-colors/dark.tmux
new file mode 100644
index 00000000..8d866994
--- /dev/null
+++ b/hm-imports/tmux/tmux-switch-colors/dark.tmux
@@ -0,0 +1,50 @@
+## COLORSCHEME: gruvbox dark (medium)
+set-option -g status "on"
+
+# default statusbar color
+set-option -g status-style bg=colour237,fg=colour223 # bg=bg1, fg=fg1
+
+# default window title colors
+set-window-option -g window-status-style bg=colour214,fg=colour237 # bg=yellow, fg=bg1
+
+# default window with an activity alert
+set-window-option -g window-status-activity-style bg=colour237,fg=colour248 # bg=bg1, fg=fg3
+
+# active window title colors
+set-window-option -g window-status-current-style bg=red,fg=colour237 # fg=bg1
+
+# pane border
+set-option -g pane-active-border-style fg=colour250 #fg2
+set-option -g pane-border-style fg=colour237 #bg1
+
+# message infos
+set-option -g message-style bg=colour239,fg=colour223 # bg=bg2, fg=fg1
+
+# writing commands inactive
+set-option -g message-command-style bg=colour239,fg=colour223 # bg=fg3, fg=bg1
+
+# pane number display
+set-option -g display-panes-active-colour colour250 #fg2
+set-option -g display-panes-colour colour237 #bg1
+
+# clock
+set-window-option -g clock-mode-colour colour109 #blue
+
+# bell
+set-window-option -g window-status-bell-style bg=colour167,fg=colour235 # bg=red, fg=bg
+
+## Theme settings mixed with colors (unfortunately, but there is no cleaner way)
+set-option -g status-justify "left"
+set-option -g status-left-style none
+set-option -g status-left-length "80"
+set-option -g status-right-style none
+set-option -g status-right-length "80"
+set-window-option -g window-status-separator ""
+
+set-option -g status-left "#[bg=colour241,fg=colour248] #S #[bg=colour237,fg=colour241,nobold,noitalics,nounderscore]"
+set-option -g status-right "#[bg=colour237,fg=colour239 nobold, nounderscore, noitalics]#[bg=colour239,fg=colour246] %Y-%m-%d  %H:%M #[bg=colour239,fg=colour248,nobold,noitalics,nounderscore]#[bg=colour248,fg=colour237] #h "
+
+set-window-option -g window-status-current-format "#[bg=colour214,fg=colour237,nobold,noitalics,nounderscore]#[bg=colour214,fg=colour239] #I #[bg=colour214,fg=colour239,bold] #W#{?window_zoomed_flag,*Z,} #[bg=colour237,fg=colour214,nobold,noitalics,nounderscore]"
+set-window-option -g window-status-format "#[bg=colour239,fg=colour237,noitalics]#[bg=colour239,fg=colour223] #I #[bg=colour239,fg=colour223] #W #[bg=colour237,fg=colour239,noitalics]"
+
+# vim: set ft=tmux tw=0 nowrap:
diff --git a/hm-imports/tmux/tmux-switch-colors/light.tmux b/hm-imports/tmux/tmux-switch-colors/light.tmux
new file mode 100644
index 00000000..0f73eb21
--- /dev/null
+++ b/hm-imports/tmux/tmux-switch-colors/light.tmux
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+# TokyoNight colors for Tmux
+
+set -g mode-style "fg=#2e7de9,bg=#a8aecb"
+
+set -g message-style "fg=#2e7de9,bg=#a8aecb"
+set -g message-command-style "fg=#2e7de9,bg=#a8aecb"
+
+set -g pane-border-style "fg=#a8aecb"
+set -g pane-active-border-style "fg=#2e7de9"
+
+set -g status "on"
+set -g status-justify "left"
+
+set -g status-style "fg=#2e7de9,bg=#e9e9ec"
+
+set -g status-left-length "100"
+set -g status-right-length "100"
+
+set -g status-left-style NONE
+set -g status-right-style NONE
+
+set -g status-left "#[fg=#e9e9ed,bg=#2e7de9,bold] #S #[fg=#2e7de9,bg=#e9e9ec,nobold,nounderscore,noitalics]"
+set -g status-right "#[fg=#e9e9ec,bg=#e9e9ec,nobold,nounderscore,noitalics]#[fg=#2e7de9,bg=#e9e9ec] #{prefix_highlight} #[fg=#a8aecb,bg=#e9e9ec,nobold,nounderscore,noitalics]#[fg=#2e7de9,bg=#a8aecb] %Y-%m-%d  %I:%M %p #[fg=#2e7de9,bg=#a8aecb,nobold,nounderscore,noitalics]#[fg=#e9e9ed,bg=#2e7de9,bold] #h "
+if-shell '[ "$(tmux show-option -gqv "clock-mode-style")" == "24" ]' {
+  set -g status-right "#[fg=#e9e9ec,bg=#e9e9ec,nobold,nounderscore,noitalics]#[fg=#2e7de9,bg=#e9e9ec] #{prefix_highlight} #[fg=#a8aecb,bg=#e9e9ec,nobold,nounderscore,noitalics]#[fg=#2e7de9,bg=#a8aecb] %Y-%m-%d  %H:%M #[fg=#2e7de9,bg=#a8aecb,nobold,nounderscore,noitalics]#[fg=#e9e9ed,bg=#2e7de9,bold] #h "
+}
+
+setw -g window-status-activity-style "underscore,fg=#6172b0,bg=#e9e9ec"
+setw -g window-status-separator ""
+setw -g window-status-style "NONE,fg=#6172b0,bg=#e9e9ec"
+setw -g window-status-format "#[fg=#e9e9ec,bg=#e9e9ec,nobold,nounderscore,noitalics]#[default] #I  #W #F #[fg=#e9e9ec,bg=#e9e9ec,nobold,nounderscore,noitalics]"
+setw -g window-status-current-format "#[fg=#e9e9ec,bg=#a8aecb,nobold,nounderscore,noitalics]#[fg=#2e7de9,bg=#a8aecb,bold] #I  #W #F #[fg=#a8aecb,bg=#e9e9ec,nobold,nounderscore,noitalics]"
+
+# tmux-plugins/tmux-prefix-highlight support
+set -g @prefix_highlight_output_prefix "#[fg=#8c6c3e]#[bg=#e9e9ec]#[fg=#e9e9ec]#[bg=#8c6c3e]"
+set -g @prefix_highlight_output_suffix ""
diff --git a/hm-imports/tmux/tmux-switch-colors/start_theme_switcher.sh b/hm-imports/tmux/tmux-switch-colors/start_theme_switcher.sh
new file mode 100755
index 00000000..09e7f4e7
--- /dev/null
+++ b/hm-imports/tmux/tmux-switch-colors/start_theme_switcher.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o pipefail
+
+
+DN=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+$DN/theme_switcher.sh
diff --git a/hm-imports/tmux/tmux-switch-colors/theme_setter.sh b/hm-imports/tmux/tmux-switch-colors/theme_setter.sh
new file mode 100755
index 00000000..7ead9203
--- /dev/null
+++ b/hm-imports/tmux/tmux-switch-colors/theme_setter.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+DN=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+if [[ $1 == "dark" ]]; then
+  tmux source-file $DN/dark.tmux
+else
+  tmux source-file $DN/light.tmux
+fi
diff --git a/hm-imports/tmux/tmux-switch-colors/theme_switcher.sh b/hm-imports/tmux/tmux-switch-colors/theme_switcher.sh
new file mode 100755
index 00000000..25aed8db
--- /dev/null
+++ b/hm-imports/tmux/tmux-switch-colors/theme_switcher.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o pipefail
+[[ "${TRACE-0}" =~ ^1|t|y|true|yes$ ]] && set -o xtrace
+
+
+[[ ! $(type -P "dark-notify") ]] && echo "dark-notify command not found. Exiting..." && exit 0
+DN=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+SCRIPT_NAME="$(basename $0)"
+
+THEME_SETTER="$DN/theme_setter.sh"
+
+if pgrep -qf "$SCRIPT_NAME"; then
+	echo "$SCRIPT_NAME is already running, nothing to do here."
+	exit 0
+fi
+
+while :; do
+  dark-notify -c "$THEME_SETTER"
+done
diff --git a/hosts/daedalus/default.nix b/hosts/daedalus/default.nix
index 1efa1064..79ff5969 100644
--- a/hosts/daedalus/default.nix
+++ b/hosts/daedalus/default.nix
@@ -15,6 +15,7 @@ with lib.my;
     enable = true;
     brews = [
       "pam-reattach"
+      "cormacrelf/tap/dark-notify"
     ];
     casks = [
       "heroic"