A brand style guide’s real job is simple to state: let anyone — a new employee, a freelance designer, a local print shop, a social media manager you just hired — represent your brand correctly without needing to ask you personally every single time a question comes up. A “guide” that’s just a logo file and a couple of color swatches pasted into a document doesn’t do that job, no matter how nice it looks.
Logo usage rules, including specific examples of what not to do
Include the primary logo file, any officially approved variations (a horizontal lockup, a stacked version, an icon-only mark for small spaces), minimum size requirements below which the logo shouldn’t be shrunk, required clear space around the logo, and which background colors it’s approved to sit on. Just as important as showing the correct usage: include a few brief examples of misuse — stretching the logo out of proportion, recoloring it incorrectly, placing it on a background without enough contrast to read clearly. People are noticeably more likely to avoid a specific mistake once they’ve seen it called out directly, rather than being left to infer the rule on their own.
Exact color values, never vague descriptions
Every single brand color needs its hex code listed at minimum, plus RGB and CMYK values if the brand will ever realistically appear in any printed material. “Our blue” is not usable information for anyone trying to reproduce it accurately; “#0B1E39” is exact and unambiguous. Note clearly which colors are primary, which are secondary, and which are meant purely as accents, and give a rough sense of the intended usage ratio between them — most well-designed brands lean heavily on one or two dominant colors, with an accent color used sparingly and deliberately for emphasis.
Typography: which fonts, and in which specific contexts
Specify the exact font (or font stack) used for headlines, and the one used for body text if it’s different, along with the specific weights used for each (regular, medium, bold, and so on). Note reliable fallback fonts for contexts where the primary typeface isn’t available — certain email clients, for instance, or systems that don’t have a particular licensed font installed — so text still renders reasonably well even when the ideal typeface can’t load.
Voice and tone guidance, in plain language
This is the section most style guides skip entirely, and it’s often the single most useful section when it’s included. A few genuine sentences describing how the brand talks — formal or conversational, playful or serious, first person or third person, short sentences or more elaborate ones — combined with a short list of specific words or phrases the brand does and deliberately doesn’t use, gives anyone writing copy on the brand’s behalf a concrete reference point to work from instead of guessing at tone from scratch each time.
Imagery and photography direction
If your brand relies on real photography, note the general intended style clearly: bright and airy versus moody and dramatic, candid and natural versus carefully posed, and whether stock photography is acceptable at all and, if so, what specific kind fits the brand. If you rely primarily on illustrations or icons instead of photos, note the style precisely — line weight, level of detail, color usage — so that anything new commissioned or created later matches what’s already established rather than clashing with it.
Application examples that show the system working together
Beyond listing individual rules in isolation, it helps to include a few real, worked examples showing the full system applied together — a sample social media post, a sample business card layout, a sample email header. Seeing the color palette, typography, logo, and voice all working in combination on one real example clarifies the overall system far more effectively than any list of individual rules ever fully can on its own.
A style guide is only useful if people use it
A forty-page polished PDF that nobody ever opens isn’t a functioning style guide in any practical sense — it’s a document that exists. The most useful format in practice is often a single, well-organized page or a short, focused document that anyone touching the brand can reference and act on in under two minutes. Comprehensive is good in principle, but comprehensive and unused is worthless in practice. Build it specifically to get opened and referenced, not just to look thorough sitting in a folder.
Keep it as a living document, not a one-time deliverable
A style guide written once at the time of a brand’s launch and never revisited afterward tends to fall out of sync with how the brand is being used in practice a year or two later. As new needs come up — a new social platform, a new type of printed material, a new product line — it’s worth adding the relevant guidance to the style guide at that point, rather than letting undocumented decisions accumulate informally outside of it. A style guide that keeps pace with the brand stays useful; one that’s frozen in time gradually becomes irrelevant to how the brand is being applied.