Every brand ends up being made by more people than the ones who designed it. A freelancer builds the pitch deck, an intern posts the reel, a printer sets up the sign, and an AI tool drafts the email campaign. The identity only holds together if the decisions behind it are written down somewhere all of them can find. That’s what brand guidelines are for.
What brand guidelines are
Brand guidelines (also called a brand book, style guide or brand manual) record how a brand looks and sounds, and why each choice was made. They sit between the strategy, which sets out what the brand is, and the everyday work people actually see. The point is that someone who wasn’t in the room when the brand was designed can still get it right.
The best ones read like a handover from a thoughtful colleague: this is what we do, this is why, and this is what to do in the situations we can see coming. A list of rules with no explanation is much easier to ignore.
What they should include
These are the ten sections we’d put in most sets of guidelines.
The ten sections
1. Foundations. One page each on positioning, audience and personality, taken from the strategy. Without this, the rest is just rules with no reasons attached, and people break rules they don’t understand the first time those rules get in the way.
2. Logo. Your primary logo, any secondary versions, and the symbol on its own. Set out clear space and minimum sizes, and which version to use on light, dark and photo backgrounds. Add a short page of things not to do, using mistakes people genuinely make rather than silly ones nobody would.
3. Colour. List every colour with its values in each system you use (HEX, RGB, CMYK and Pantone). More importantly, show the proportions: which colour is the main background, which is the accent, and which combinations have enough contrast for text. For on-screen text, that means at least 4.5:1 for body copy to meet WCAG AA. Without proportions, everyone who uses the palette ends up with a slightly different brand.
4. Typography. List the typefaces and the weights you’ve licensed, and check the licence covers web and apps as well as print. Then add a type scale showing headlines, subheadings, body text and captions, with sizes and spacing. Include fallback fonts for emails and documents where the brand fonts won’t load.
5. Imagery. Give direction for photography, illustration style and icons, plus any treatment that makes an image feel like yours, such as grain, duotone or a particular crop. Examples of what’s right and what’s nearly right will help more than a list of adjectives.
6. Voice and tone. This covers how the brand writes. Describe the personality as “this, not that” pairs, note the sentence-level habits and the words you do and don’t use, and show how the tone shifts between a launch announcement and an apology. Real before-and-after rewrites are the most useful part.
7. Layout and composition. Set out the grid, the margins, how much white space to leave, where the logo sits and how a page is put together. This section keeps the brand from looking cramped in one place and empty in another.
8. Applications. Show the identity applied to things the business actually makes: social templates, decks, email signatures, documents, signage and packaging. Give each one a working template file as well as a picture.
9. AI usage. Say which AI tools the team can use, which prompts and reference files produce on-brand results, and what a person should always check before anything goes out. Guidelines written for people don’t guide an AI model on their own. This section does.
10. File index. Record where everything is saved, what each file is for and what the file names mean. It’s often the page people come back to most.
Why they’re worth having
People don’t remember a brand after seeing it once. They build up a picture over dozens of encounters, and that only works if those encounters look and sound like the same business. Each off-brand post or document chips away at something that took years to build.
Guidelines also make the brand cheaper to run. Without them, every new piece of work starts with someone messaging whoever made the last one. With them, a new hire, a freelancer or another agency can get it right on day one. They’ll pay for themselves within a few months of nobody having to ask “which blue?” again.
They protect what you spent on the brand in the first place. A rebrand is a big investment, and guidelines stop it slowly wearing down. A common way brands go wrong is a good identity drifting over time. One exception after another seems reasonable at the time, until nothing quite matches.
They also give you a brief for every tool you’ll use from now on. Design software, website builders, email platforms and AI models all work better with a reference. If your guidelines are clear and well structured, you can hand them over and get on-brand results. If they’re not, you end up re-explaining the brand in every prompt, and never quite the same way twice.
What good guidelines look like
Most businesses need twenty to forty pages, and you should only go longer if the brand is genuinely used in more places. Write them in the brand’s own voice, so the document itself becomes an example. Keep them somewhere they can be updated easily, ideally a web page rather than a PDF that sits unopened in someone’s downloads folder. And explain the reasoning throughout, because people stick to rules they understand even when nobody’s checking.
Frequently asked questions
What are brand guidelines?
A document that sets out how a brand is presented, covering its logo, colours, typography, imagery, voice and layout, along with the reasons behind those choices. It means anyone making material for the brand ends up with the same result.
What should brand guidelines include?
At a minimum: foundations, logo rules, colour, typography, imagery, voice and tone, layout, applications, AI usage and a file index. Most run to twenty to forty pages.
Why do brand guidelines matter?
People recognise brands that look and sound the same every time they see them, and they’re more likely to trust brands they recognise. Without guidelines, a brand drifts a little every time a new person or tool works on it.
