Call of Cthulhu: Deep One

Black water off Innsmouth. Something with too many eyes is watching the wharf, and the light under the waves is green.

A dark Omarchy theme built around eldritch green on near-black sea-green, with a violet flicker of something older in the clouds. Made for late nights and OLED panels.

Part of the Call of Cthulhu trilogy for Omarchy. Each theme is its own repo; install one or all three:

• R'lyeh · the drowned city, cold abyssal blue and cyan
• Colour Out of Space · the blasted heath, a violet that is not quite a colour

Install

Menu: Super + Alt + Space → Install → Style → Theme, paste the URL below and press Enter.

Terminal:

omarchy theme install https://github.com/sonderbydk/omarchy-cthulhu-deep-one-theme.git

Switch later with the theme switcher (Super + Ctrl + Shift + Space) or:

omarchy theme set "Cthulhu Deep One"
omarchy theme bg next   # cycle the four wallpapers

Wallpapers

Four original scenes, 3840×2160, composed so they also crop cleanly to 16:10 laptops.

1. Cthulhu rising · 2. Innsmouth harbour · 3. The drowned temple · 4. Devil Reef

Palette

Full set in colors.toml.

What's included

• colors.toml — Omarchy renders it into every terminal (Alacritty, Ghostty, Kitty, Foot), btop, Hyprland borders, the shell, Chromium, VS Code, Neovim, Obsidian and keyboard RGB.
• shell.toml — translucent bar so the wallpaper shows through; menus, popups and notifications sit on the deeper background tone.
• Gradient active-window border (#43d68c → #a06ee8).
• Lock screen logo in the accent colour, plus preview-unlock.png.

• Icon theme: Yaru-prussiangreen.

Credits

Wallpapers were generated with GPT Image 2 for this theme and are released under the same MIT license as the rest of the repo. Lovecraft's Mythos is public domain; the dread is all his.