Nightfall

An Omarchy theme inspired by the colors of the night sky — purple, cyan, and teal accents over a deep #1c1e26 background.

Originally a JetBrains theme by @coeiico (now maintained by me); this is the port to Omarchy.

What's included

• Palette (colors.toml) — drives auto-theming for terminals (Alacritty, Ghostty, Kitty, Foot), Obsidian, Chromium, waybar, mako, walker, hyprland/hyprlock, and more
• Neovim (neovim.lua) — references nightfall.nvim via LazyVim. Omarchy only trusts .lua from a theme it didn't clone from git, so installing this theme the normal way (omarchy theme install) does not load nightfall.nvim — Neovim instead falls back to Omarchy's generic colors.toml-driven theme. See Full Neovim experience below to get the real thing.
• btop (btop.theme) — system monitor colors with a teal → yellow → red gradient
• VS Code (vscode.json) — points at qatoqat.nightfall-theme
• Icons (icons.theme) — Yaru-purple
• Wallpapers (backgrounds/) — seven original wallpapers generated with wallpapers/generate.py
• Unlock logo (unlock.png) — OMARCHY in rainbow palette

Screenshots

Neovim	btop
Lazygit	Fastfetch

Install

omarchy theme install https://github.com/mattlibera/omarchy-nightfall-theme.git

This gets you everything except the real Neovim colorscheme — see below.

Full Neovim experience

Omarchy strips .lua files from any theme it installs from a git repo (it won't run a stranger's Lua at startup), so omarchy theme install alone will render Neovim with a generic, colors.toml-driven approximation rather than nightfall.nvim itself. To get the real thing, install this theme from a plain download instead of a git clone, so Omarchy treats it as trusted and keeps neovim.lua:

curl -L -o /tmp/nightfall-theme.zip \
  https://github.com/mattlibera/omarchy-nightfall-theme/archive/refs/heads/master.zip
rm -rf ~/.config/omarchy/themes/nightfall
unzip -q /tmp/nightfall-theme.zip -d /tmp
mv /tmp/omarchy-nightfall-theme-master ~/.config/omarchy/themes/nightfall
omarchy theme set nightfall

Then restart Neovim (or run :Lazy sync) so it picks up nightfall.nvim.

This trades the usual git-clone safety net for the full theme — you're choosing to trust this repo's neovim.lua to run directly. It also means omarchy theme update won't track it, since that command only pulls themes it recognizes as git clones; re-run the steps above to pick up updates.

Wallpapers

The seven wallpapers in backgrounds/ are generated procedurally — nebula, flow field, geometry, aurora, starfield, topographic, and mesh gradient. Regenerate or add your own with:

python wallpapers/generate.py

Requires numpy, pillow, and scipy.