diff --git a/dot_config/fish/private_functions/dark.fish b/dot_config/fish/private_functions/dark.fish
new file mode 100644
index 0000000..adda9e8
--- /dev/null
+++ b/dot_config/fish/private_functions/dark.fish
@@ -0,0 +1,4 @@
+function dark --description 'Set shell theme to dark mode, including neovim'
+yes | fish_config theme save "Catppuccin Mocha"
+update_nvim_theme dark
+end
diff --git a/dot_config/fish/private_functions/light.fish b/dot_config/fish/private_functions/light.fish
new file mode 100644
index 0000000..99d7e4f
--- /dev/null
+++ b/dot_config/fish/private_functions/light.fish
@@ -0,0 +1,4 @@
+function light --description 'Set shell theme to light mode, including neovim'
+yes | fish_config theme save "Catppuccin Latte"
+update_nvim_theme light
+end