Catthode for Gemini CLI

From CRT to OLED. Bringing warmth back to a world of cold themes. cattho.de

Catthode is a high-contrast, retro-futuristic theme designed for prolonged coding sessions. It blends the crushed blacks of modern OLED displays with the comforting, warm glow of analog tungsten filaments.

🎨 Color Palette

Surface

Color	Hex	Role
Base	#000000	Editor background, pure void
Sidebar	#141414	Sidebars, panels, widgets
Selection	#2d2d2d	Text selection, hover states, buttons
Border	#636363	Borders, subtle dividers

Phosphor

Color	Hex	Role
Text	#ffffff	Standard text
Variable	#e8e8e8	Variables, identifiers
Comment	#b3b3b3	Comments, docstrings
Ignored	#757575	Ignored files, disabled elements

Glow

Color	Hex	Role
Wheat	#fae2c8	Types, classes, bright glow
Tan	#d9b98c	Secondary glow
Gold	#ffb86c	Keywords, storage, headers
Amber	#ff9e3b	Functions, accents, active states
Clay	#f08d49	Operators, punctuation

Accents

Color	Hex	Role
Red	#ff6b6b	Errors, deletions, dangerous actions
Green	#b9d665	Strings, insertions, success
Cyan	#aee6d6	Regex, escapes, information
Blue	#9cd9e6	Links, properties, secondary info
Purple	#eba4be	Constants, numbers, booleans

📦 Installation

Option 1: Load from file (Recommended)

1. Download catthode.json to your home directory (e.g., ~/.gemini/themes/catthode.json).

   mkdir -p ~/.gemini/themes
   curl -o ~/.gemini/themes/catthode.json https://raw.githubusercontent.com/catthode/gemini-cli/main/catthode.json

2. Update your settings.json (usually located at ~/.gemini/settings.json) to point to the theme file.

   {
     "ui": {
       "theme": "/Users/YOUR_USERNAME/.gemini/themes/catthode.json"
     }
   }

   Note: Replace /Users/YOUR_USERNAME with your actual home directory path. For security, Gemini CLI only loads themes from within your home directory.

Option 2: Add as a Custom Theme

1. Open your ~/.gemini/settings.json.

2. Add Catthode to the customThemes block:

   {
     "ui": {
       "customThemes": {
         "Catthode": {
           "name": "Catthode",
           "type": "custom",
           "Background": "#000000",
           "Foreground": "#FFFFFF",
           "LightBlue": "#9CD9E6",
           "AccentBlue": "#9CD9E6",
           "AccentPurple": "#EBA4BE",
           "AccentCyan": "#AEE6D6",
           "AccentGreen": "#B9D665",
           "AccentYellow": "#D9B98C",
           "AccentRed": "#FF6B6B",
           "Comment": "#757575",
           "Gray": "#636363",
           "DiffAdded": "#B9D665",
           "DiffRemoved": "#FF6B6B",
           "DiffModified": "#FFB86C",
           "GradientColors": [
               "#FFB86C",
               "#FF9E3B",
               "#F08D49"
           ],
           "text": {
               "primary": "#FFFFFF",
               "secondary": "#E8E8E8",
               "link": "#D9B98C",
               "accent": "#FF9E3B",
               "response": "#FFFFFF"
           }
         }
       },
       "theme": "Catthode"
     }
   }

3. Select the theme using the /theme command in Gemini CLI.