Brand book vs style guide vs brand kit: what's the difference?

Brand book, brand guidelines, style guide, brand kit, design system. They all describe how a brand should look, and people use them loosely. The differences are small but real, and knowing them helps you ask for the right thing.

The short version

Brand book

A brand book is the most complete of the five. It explains what the brand is, then shows how it looks and sounds, with real examples. A good one reads more like a short presentation than a rulebook.

Encosta Lenta, a seven-room guesthouse in the Douro valley and one of our example brands, has a brand book that starts with its headline, "Seven rooms on a slow hillside", and moves through logo, colors, type, voice and photos of the house.

Brand guidelines

Brand guidelines are the instructions inside the book. Clear space around the logo, which colors go together, the minimum text size, the words to avoid. In practice, most people say "brand guidelines" and "brand book" to mean the same document. We use them interchangeably in what is a brand book.

Style guide

"Style guide" is the slipperiest term. In publishing and journalism it means writing rules: spelling, punctuation, how to write numbers and dates, words the brand prefers. Many companies also call their visual guidelines a "brand style guide".

If someone asks for a style guide, ask whether they mean writing, visuals or both.

Brand kit

A brand kit is the toolbox, not the instructions. Logo files in every format, font files, color codes, templates for social posts and presentations. Design apps often use the term for the colors and logos you save inside the app so they're one click away.

A brand book tells you how to use the kit. A kit without a book tends to get used inconsistently. A book without a kit means people go hunting for files.

Design system

A design system is for products on screens: websites and apps. It turns the brand into building blocks:

• Design tokens, the brand's colors, fonts, spacing, corners and shadows stored as named values (primary, radius-button) that code and design tools can read.
• Components, buttons, inputs, cards and menus built once and reused everywhere.
• Documentation on when to use each piece.

A brand book says "our main color is wine red #5E1F2B". A design system says "the primary button uses color-primary with radius-button", and the code already does it.

The newest addition is DESIGN.md, a single text file that describes a design system for AI tools. We explain it in DESIGN.md: what it is and how to use it.

Which one do you need?

• Small business with a website and social accounts: a brand book plus a brand kit.
• Startup building a product: a brand book plus a design system, at least the tokens and core components.
• Freelancer or agency handing over a brand: all of it, because the client will pass it on to people you'll never meet.

The good news is they're built from the same source. Once your logo, colors, fonts and voice are pinned down, the book, the kit and the tokens are different views of the same decisions.

Frequently asked questions

Is a brand book the same as brand guidelines?

Mostly, yes. Brand guidelines are the rules, and a brand book is the document that holds them, usually with more context and examples. Most people use the terms interchangeably.

What is the difference between a brand kit and a brand book?

A brand kit is the set of files and assets: logos, fonts, colors and templates. A brand book explains how to use them. You need both for a brand to stay consistent.

Is a design system part of a brand book?

They overlap. A brand book covers the whole brand, while a design system turns the visual parts into tokens and components for websites and apps. Many teams now include the basic tokens in the brand book itself.