Design & Motion · anthropics/skills

brand-guidelines

Name: brand-guidelines
Author: anthropics/skills

Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel. Use it when brand colors or style guidelines, visual formatting, or company design standards apply.

L1 Basic · Source registration onlyV1 Commit-PinnedDual-pass Audit

Author anthropicsGitHub anthropics/skills ↗Stars 174801License Apache-2.0（目录内 LICENSE.txt；仓库级 license 字段 GitHub 返回 null）Commit 41bbe19d1a

Control levels describe skill capabilities and suggested control measures; they do not represent quality or safety certifications, nor do they dictate usability. Usage decisions rest entirely with users and administrators. Different agent hosts apply varying constraints; do not assume hosts provide automatic protection. Third-party skill copyrights belong to their original authors. Use at your own risk.

1How It Works & Mechanism

Pure prompt/knowledge-injection skill: SKILL.md embeds Anthropic's official color palette (4 neutrals + 3 accents, 7 hex values total) and font pairings (Poppins/Lora + Arial/Georgia fallbacks) directly into the model context. The model adheres to these rules when producing artifacts—involving zero scripts, CLIs, or network resources.

SKILL.md

- Dark: `#141413` - Primary text and dark backgrounds - Light: `#faf9f5` - Light backgrounds and text on dark - Mid Gray: `#b0aea5` - Secondary elements - Light Gray: `#e8e6dc` - Subtle backgrounds

This is the core vehicle of the entire skill: all 'official resources' consist of embedded hex values and font names, which the host model can follow without internet access. A git ls-tree check of the directory reveals only 2 blobs (SKILL.md + LICENSE.txt) and no executable code.

Driven by 'rules as behavior': Intelligent font size layering (Poppins for headings 24pt and above), background-adaptive text coloring, and cycling through the three accent colors for non-text shapes are behavioral instructions provided to the model rather than verifiable programmatic mechanisms.

SKILL.md

- Applies Poppins font to headings (24pt and larger) - Applies Lora font to body text - Automatically falls back to Arial/Georgia if custom fonts unavailable

'24pt' reflects print/slide typography semantics (PPTX/DOCX measured in pt), hinting that it primarily targets document and presentation generation scenarios; execution quality relies entirely on the host model's adherence without automated validation steps.

The font strategy adopts 'environment pre-installed priority + automatic fallback', explicitly requiring no font installation to ensure predictable cross-system output.

SKILL.md

- No font installation required - works with existing system fonts - For best results, pre-install Poppins and Lora fonts in your environment

Fonts are treated as a runtime prerequisite rather than bundled assets: when missing from the environment, it relies on Arial/Georgia fallbacks, slightly diminishing the brand aesthetic but avoiding errors.

The 'Color Application' section claims to apply RGB values via python-pptx RGBColor, but the skill contains neither RGB triplets nor any code—converting hex to RGB and invoking python-pptx are left entirely to the model, serving as contextual guidance rather than a built-in implementation.

SKILL.md

- Uses RGB color values for precise brand matching - Applied via python-pptx's RGBColor class

A discrepancy exists between stated functionality and actual content (see verification.discrepancy): this section does not apply to HTML or image artifacts; it becomes an effective prompt only when the model generates PPTX using python-pptx. This matches the context in claude-api SKILL.md L566 in the same repo ('code execution sandbox pre-installed python-pptx'), supporting its target toward PPTX generation.

2Core Capabilities

01Embedded official 7-color palette: 4 neutrals (#141413/#faf9f5/#b0aea5/#e8e6dc) + 3 accents (#d97757/#6a9bcc/#788c5d)

02Font pairing and fallbacks: Headings Poppins→Arial, Body Lora→Georgia

03Tiered smart font application based on font size (Poppins for headings 24pt+)

04Background-adaptive text color selection (Smart color selection based on background)

05Cycling orange/blue/green accent colors for non-text shapes to maintain brand aesthetics

06Zero-installation font strategy ensuring predictable cross-system rendering

3External Dependencies

Kind	Dependency / Endpoint
package	系统预装字体 Poppins / Lora（可选运行时前提，非随附、非下载）

4Recommended Governance & Evidence

Suggested Controls for Safe Operation

For Agent Runtime

Can be auto-loaded

For Administrators

Evidence & Triggers (File Paths & Excerpts)

SKILL.md: Pure prompt instructions and rule text, without script execution or external impacts

Audit Notes: Purely instruction-based (the entire SKILL.md consists of markdown rules, confirmed byte-by-byte to have no code blocks); git ls-tree HEAD confirms the directory contains only two blobs (SKILL.md + LICENSE.txt), with no scripts, no outbound network calls, no credential reading, and no forced local writes. All behaviors occur during the model's artifact generation phase and are constrained by the host's permissions.

5Second-Pass Verification

[ok] external_deps 为空（无 CLI/API/网络端点）：全文 grep http(s):// / gh / curl 等关键字无命中，raw 阅读确认无 URL — SKILL.md 无任何外部调用点
[ok] 字体前提条目：'Fonts should be pre-installed in your environment' 定位到 L36 与 L67 两处，成立 — 两条同义指令互为印证
[discrepancy] 「Uses RGB color values / Applied via python-pptx's RGBColor class」 — 技能内既无 RGB 三元组（只有 hex）也无任何 python-pptx 代码或 import 调用；该句是写给模型的场景提示而非技能自带实现，存在表述夸大。色值本身经与同仓官方 HTML 资产（algorithmic-art/templates/viewer.html :root、skill-creator/assets/eval_review.html CSS）比对完全一致，palette 真实性无问题
[ok] 安全面 🟢 结论：目录是否藏脚本/隐藏文件 — ls -la 与 git ls-tree HEAD brand-guidelines/ 均只列 SKILL.md + LICENSE.txt 两 blob，无隐藏文件、无符号链接、无子目录
[ok] 实现原理「纯知识注入、无外部官方资源拉取」 — Overview 称 'access Anthropic's official brand identity and style resources'，但全文零外部链接、零下载指令，资源确实内嵌；宣称方式有修辞成分但机制描述准确
[ok] 功能声明 vs 实际能力：description 称可应用到 'any sort of artifact' — 无色值以外的机器能力承诺，模型可对 HTML/DOCX/PPTX/图片任一产物套用规则；'python-pptx RGBColor' 为唯一偏离点（见上）
[ok] meta：stars/pushed_at 真实性 — gh api repos/anthropics/skills 返回 stargazers_count=174801、pushed_at=2026-09-03T16:37:14Z，与本地 shallow clone HEAD（41bbe19, 2026-09-03）一致；仓库级 license API 返回 null → 以目录内 Apache-2.0 LICENSE.txt 为准

6Verdict & Scenarios

Zero-dependency plug-and-play: Pure instructions with no scripts, taking effect as soon as loaded by any host model

Authoritative and self-consistent palette: Originates from the official anthropics/skills repository, aligning color-for-color with official HTML assets in the same repo (CSS in algorithmic-art/templates/viewer.html and skill-creator/assets/eval_review.html)

Built-in fallback system for predictable cross-environment output: Automatically falls back to Arial/Georgia if fonts are missing, explicitly avoiding forced font installations

Compact rule footprint loaded straight into context: 7 colors + 2 fonts + 4 behavioral rules, imposing minimal overhead on model adherence

Best for: Scenarios generating artifacts with an 'Anthropic look-and-feel' in Claude environments: internal company decks/documents/HTML prototypes/chart color schemes, acting as a specification injection layer for design skills; especially suited for PPTX generation (leveraging sandbox pre-installed python-pptx) and web prototyping.

Not for: Serious brand projects requiring complete up-to-date brand guidelines, logo/font asset distribution, or machine-verifiable outputs; any non-Anthropic branded deliverables (risks misapplying Anthropic styling to third-party assets); occasions requiring strict brand precision that cannot tolerate model improvisation (lacks fail-safe validation).

Install Agent-Ready

① Verified Mirror 2026-09-06

Option A · Direct DownloadDownload brand-guidelines.tar.gz

sha256: c51fd8ba27ceb7b2…

Option B · Copy Guide for Agent

install.json

Agents automatically download and verify mirrors from this JSON guide.

② Upstream GitHub

GitHub Repo ↗

Pinned to commit 41bbe19d1a.