Amber Cathode

An Obsidian dark theme inspired by 80s amber CRT monitors and BBS (Bulletin Board System) aesthetics.

Features

• Amber phosphor palette — authentic monochrome CRT colour scheme
• CRT scanlines — horizontal line overlay simulating electron beam raster
• Phosphor glow — text-shadow on all elements for that warm glow
• Screen vignette — heavy edge darkening simulating barrel distortion
• Phosphor grain — subtle SVG noise simulating dot pitch structure
• Full monospace — IBM Plex Mono / JetBrains Mono throughout
• Sharp corners — zero border-radius for a true terminal feel
• Subtle CRT flicker — barely perceptible animation for immersion
• BBS-themed demo — includes a showcase file with ASCII art, BASIC code, and retro content

Installation

1. Open Obsidian Settings → Appearance → Themes
2. Click "Manage" and search for Amber Cathode
3. Click "Install and use"

Manual Installation

1. Download theme.css and manifest.json
2. Create a folder called Amber Cathode in your vault's .obsidian/themes/ directory
3. Place both files inside
4. Activate the theme in Settings → Appearance

Colour Palette

Role	Hex
Phosphor Bright	#ffb000
Phosphor Normal	#cc8800
Phosphor Muted	#8a5e10
Phosphor Dim	#5a3e0a
Screen Black	#0c0a04
Sidebar	#060400
Border	#2a2208

Credits

Created by Björn Kindler

License

MIT License — see LICENSE