Claude Paper

An unofficial Obsidian theme inspired by Claude and Anthropic's warm, thoughtful visual language. It combines clay accents, quiet paper-like surfaces, unified bilingual serif typography, precise monospaced code, and matched light and dark modes.

Claude Paper is an independent community project by Law-Of-Cycles. It is not affiliated with, endorsed by, or sponsored by Anthropic. Claude and Anthropic are trademarks of Anthropic PBC. No Anthropic artwork or commercial font files are included.

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Preview

Light mode	Dark mode

Highlights

• Source Han Serif SC Variable across the interface, headings, editor, and reading view
• SF Mono across every inline and fenced code surface
• Resilient aliases for the SourceHanSerifSC-VF filename and registered family names
• Six clearly differentiated heading levels in Reading View and Live Preview
• Calm bold, italics, highlights, links, tags, quotes, lists, tasks, tables, callouts, footnotes, and properties
• Warm light mode and purpose-built dark mode using the same visual hierarchy
• Polished tabs, navigation, controls, settings, search, graph, Canvas, embeds, and code blocks
• Keyboard focus, increased-contrast, reduced-motion, small-screen, and print support
• Pure CSS with no telemetry, network requests, scripts, or bundled font files

Typography

Claude Paper intentionally uses the two locally installed fonts requested for this project. Regular interface and document text stay in one bilingual family, which avoids visible font changes between Chinese and English. Code stays monospaced and visually separate.

Role	Preferred order
Interface, headings, and body	SourceHanSerifSC-VF aliases, Source Han Serif SC, Source Han Serif, 思源宋体
Code	SF Mono, SFMono-Regular, Cascadia Mono, Cascadia Code, Consolas
True English italic fallback	Source Serif 4, Source Serif Pro, Georgia, Times New Roman

The theme sets --font-interface-theme, --font-text-theme, and --font-monospace-theme, so font choices made in Obsidian's Appearance settings still take priority. No font files are bundled or downloaded. See Font strategy for the exact aliases and troubleshooting.

Install in Obsidian

One-click local install on Windows

1. Extract the project ZIP.
2. Double-click install.cmd.
3. Select your vault folder when prompted, then choose Claude Paper in Obsidian under Settings → Appearance → Themes.

The completion dialog also reports whether Windows detected Source Han Serif SC and SF Mono.

You can also run:

powershell -ExecutionPolicy Bypass -File .\install.ps1

Manual install

Create this folder inside your vault and copy manifest.json and theme.css into it:

<your-vault>/.obsidian/themes/Claude Paper/

Restart Obsidian or use Reload app without saving, then select Claude Paper.

Publish to the Obsidian community directory

Double-click publish.cmd. The Windows publishing assistant reads the current version from manifest.json, pushes the project, creates or refreshes the matching release, and opens the Obsidian community review pull request when needed.

powershell -ExecutionPolicy Bypass -File .\publish.ps1

If GitHub CLI is not signed in, the script opens GitHub once for browser authorization. The detailed fallback procedure is in PUBLISH.md.

Customize

The main editable values are at the top of theme.css:

:root {
  --claude-paper-font-serif: ...;
  --claude-paper-font-code: ...;
  --claude-paper-content-width: 780px;
}

Color and component decisions are documented in the style guide.

Project files

• theme.css: the complete Obsidian theme
• manifest.json: community theme metadata
• screenshot.png: 512 × 288 community directory image
• install.cmd and install.ps1: local Windows installer
• publish.cmd and publish.ps1: GitHub and Obsidian submission assistant
• docs/: typography, style notes, and additional previews
• .github/workflows/release.yml: release asset verification and upload

License

MIT © Law-Of-Cycles