How to Create a Brand Style Guide for Claude Design (and Where to Build It)

TLDR: A brand style guide for Claude has two parts: a visual design system (logo, type scale, colors, buttons, icons, photography, grid) and a written guide (positioning, voice, word list, examples). Build the visuals in Figma and the words in a Google Doc or Notion page. Then load them into Claude so every output starts on-brand.

You asked Claude for a LinkedIn post and got “In today’s fast-paced landscape…” Then you asked for a one-pager and got a purple gradient you have never approved in your life.

Claude can’t guess your brand. Give it a style guide once, and you stop re-explaining your colors, your tone, and your hatred of the word “synergy” in every chat.

Why does Claude need a brand style guide?

With no context, Claude writes clean, competent copy that could belong to any company. Same with design. Anthropic’s own setup guide warns that teams who skip the design system get “functional but generic output.”

Off-brand work was a problem long before AI. In the Lucidpress 2021 Content Effectiveness Report, 77% of respondents said off-brand content gets created at their company. More than two-thirds (68%) said brand consistency contributed 10% to 20% or more of their revenue growth.

Now add a tool that drafts in seconds. Off-brand work can pile up just as fast, and you become the full-time fixer. A good style guide moves that editing work upstream, where it only happens once.

What should a brand style guide for Claude include?

Split it in two. The design system covers how things look. The written guide covers how you sound. Claude uses each one differently, so keep them as separate files.

Part 1: The visual design system

Claude can only follow specs that exist. Give it exact padding, corner radius, and hover colors, and your buttons come out matching your site. Here’s what a complete design system covers.

• Logo: primary logo, versions for light and dark backgrounds, black and white versions, the logomark on its own, and favicon sizes (48, 32, and 16 px). Add a clear space rule, like “50% of the mark’s height on every side,” and a page of logo don’ts: no recoloring, outlines, drop shadows, or busy photo backgrounds.
• Typography: font names, weights, and where to download them, plus a fallback for tools that don’t have your fonts. Then a full type scale with size and line height for desktop and mobile: H1 to H5, eyebrow, lead, body, small body, quotes, buttons, and nav links.
• Color: hex codes for primary, secondary, and neutral colors, each with its tints and shades. Add approved gradients and a contrast chart showing which text colors pass on which backgrounds.
• Buttons, links, and tags: solid, outline, and text link styles. Spell out fill, text color, padding, and corner radius for default and hover states, on light and dark backgrounds, for desktop and mobile. Include copy rules that live in the button too, like “CTAs are always title case.”
• Iconography: line weight, line color, accent colors, display size, and your approved icon set.
• Photography: who appears in photos, the lighting, the setting, and how the colors should feel next to your palette.
• Brand shapes and graphic elements: recurring shapes, lines, arrows, photo frames, and background treatments, each with a note on when to use it and an example in use.
• Layout grid: columns, margins, and gutters for desktop, tablet, and mobile.
• Navigation, footer, and form fields: the built components, so every page and mockup uses the same ones.

Pro tip: Check every color pairing against WCAG contrast guidelines (4.5:1 for body text, 3:1 for large text) and mark the passing pairs in your guide. Claude will pick from the approved list instead of guessing which teal works on white.

Part 2: The written style guide

• Brand foundation: what you do, who it’s for, your positioning statement (start with our positioning guide), and real proof points only, since Claude will repeat them
• Voice and tone: three to five traits, each with a rule and a before-and-after rewrite. “Friendly” is too vague to follow. “Use contractions, write like you talk, one joke per post at most” gives Claude a rule it can apply.
• Word list: words to use, words to avoid (“seamless,” “leverage,” “unlock”), and formatting habits like spelling, headline case, and emoji
• Channel rules: length and format for LinkedIn, email, and your website
• Real examples: three to five pieces you love, like your homepage, a strong email, and a deck

Examples carry a lot of weight. Anthropic’s design system guide notes that a finished page shows Claude more about your brand’s feel than a color palette on its own (Claude Help Center).

Brand style guide checklist (copy and paste):

DESIGN SYSTEM
Logo: primary / light / dark / logomark / favicons / clear space / don’ts
Type: fonts + fallbacks / scale for H1-H5, eyebrow, lead, body, quote, button, nav (desktop + mobile)
Color: primary / secondary / neutrals / tints + shades / gradients / contrast pairs
Buttons: solid / outline / text link / default + hover / light + dark / desktop + mobile / CTA case
Icons: line weight / colors / size / icon set
Photography: subjects / lighting / setting / color
Graphic elements: shapes / lines / photo frames / backgrounds
Grid: columns / margins / gutters per breakpoint
Components: nav / footer / form fields

WRITTEN GUIDE
Foundation: what we do / who it’s for / positioning / proof points
Voice: traits + rules + before/after
Words: always use / never use / formatting
Channels: LinkedIn / email / website
Examples: links to 3-5 pieces that nail the brand

Where should founders build a brand style guide?

Figma for the design system

Build your colors as variables, your type scale as text styles, and your buttons, nav, footer, and form fields as components. That keeps your designer’s files and your guide in sync. Claude can build a design system from Figma files, decks, logos, and fonts, so this work carries straight over (Claude Help Center).

Google Docs or Notion for the written guide

Voice, word lists, and positioning belong in a doc you can edit in two minutes. It’s easy to share with freelancers, easy to upload to Claude, and easy to connect if you use Claude’s Google Drive or Notion connectors.

Pro tip: Put a “last updated” date and an owner at the top of both files. When something changes, update Figma or the doc first, then refresh Claude. That way Claude never works from an old version.

How do you set up your style guide in Claude?

Each half of your guide has a natural home in Claude.

• Design system: ask Claude to build one from your Figma files, decks, logos, and fonts. Claude applies it to new designs and decks. Design systems are in beta on Pro, Max, Team, and Enterprise plans (Claude Help Center). Keep only design-level copy rules here, like CTA case and button wording.
• Skill: package your written guide so Claude applies your voice in any chat. Anthropic’s walkthrough shows Claude turning brand rules into a skill. Turn on Skills in your settings first.
• Project: if you’d rather keep brand work in one place, paste your voice rules into the project instructions and upload the full guide as project knowledge.

Keep the full voice guide in one place. Two copies drift apart fast.

Already set up a design system at claude.ai/design? Standalone Claude Design closes on December 14, 2026, so migrate it before then.

Prompt to build your design system (copy and paste):

Build a design system for [Company] from the attached Figma file, logo files, and fonts. Include our logo versions and clear space rules, the full type scale for desktop and mobile, our color palette with tints, shades, and approved contrast pairs, button and link styles with default and hover states on light and dark backgrounds, icon and photography rules, our layout grid, and our nav, footer, and form components. CTAs are always title case. Ask me about anything that’s missing or contradicts itself before you build it.

How do you test and maintain your style guide?

Before you trust it, run three test prompts in a fresh chat:

1. “Write a LinkedIn post announcing [real news].”
2. “Design a landing page hero for [product].”
3. “Make a one-page overview of [service] for a prospect.”

Read the copy out loud and hold the designs next to your Figma file. Check fonts, button styles, and spacing. If anything looks or sounds off, find the missing rule and add it.

After that, review the guide every quarter and any time you launch a product or update your visuals.

Pro tip: Keep a corrections log. Every time you fix the same thing in Claude’s output twice, it becomes a new rule in the guide.

Frequently asked questions

Should voice and tone go in the design system?

Only the copy rules that show up inside designs, like CTA case and button wording. Keep the full voice guide in a skill or Project.

Do I need a designer to create a brand style guide?

You can write the voice and positioning yourself. A designer is worth it for your logo, type scale, colors, and components, since those are harder to fix later.

Can I upload my existing brand guidelines PDF to Claude?

Yes, and it’s a fine starting point. Claude gets more from Figma files and real examples, so add those when you can.

Will the same style guide work in other AI tools?

The written guide will. Upload the doc or paste it into custom instructions. The skill and design system formats are specific to Claude.

Pro tip: Hand your guide to a freelancer before you give it to Claude. Every question they ask points to a rule you still need to write.

Want a brand your team and your AI tools can actually follow? Aloola builds brand identity and messaging for founder-led companies in fixed-scope sprints, with guidelines ready to load into Claude. Book a call.