What Is a Style Guide?
A style guide is a document that establishes the standards for how a brand communicates visually and verbally. It covers the rules governing typography, colour use, imagery, layout, and — in editorial style guides — grammar, tone of voice, and punctuation conventions. The purpose of a style guide is to ensure that all communication produced under a brand umbrella feels coherent and consistent, regardless of who created it.
Types of Style Guides
Style guides come in several forms depending on their scope and audience. A visual style guide focuses exclusively on design standards — how to use the logo, which typefaces to use and at what sizes, which colours are approved, and how photographic elements should be treated. An editorial style guide governs written communication — whether to use Oxford commas, how to write numbers, which words are capitalised, and what tone of voice is appropriate in different contexts. A brand style guide combines visual and editorial standards into a single document. A publication style guide (such as the AP Stylebook or Chicago Manual of Style) provides a reference framework that editorial style guides often build on.
Style Guide vs. Brand Guidelines
Style guide and brand guidelines are often used interchangeably, but there is a useful distinction. Brand guidelines are typically broader and more strategic — they include the brand story, values, and positioning alongside the technical specifications. A style guide is more narrowly focused on standards for execution: it answers the question 'how do we do this?' rather than 'why are we doing this?'. In practice, many organisations produce a comprehensive brand guidelines document that subsumes their style guide content.
What to Include in a Visual Style Guide
A practical visual style guide for a creative or digital brand typically covers logo usage (size, placement, clear space, colour variations, prohibited uses), colour palette (all approved colours with precise specifications), typography (approved typefaces, size hierarchy, line height, weight, letter spacing guidelines), imagery and photography direction (mood, subject matter, composition, post-processing style), iconography (the approved icon set and usage rules), and layout principles (grid, margins, spacing conventions). Each section should include examples of correct use and, critically, examples of incorrect use that help users avoid common mistakes.
Editorial Style Guides for Digital Brands
For brands producing significant volumes of written content — blog articles, social media posts, website copy, email campaigns — an editorial style guide is as important as a visual one. It defines the brand's tone of voice (formal vs. conversational, expert vs. approachable, playful vs. serious), vocabulary preferences (words the brand uses and avoids), structural conventions (how to write a headline, how long paragraphs should be), and specific mechanical rules (capitalisation of brand terms, how to handle numbers and percentages, preferred date formats). Without these standards, content produced by multiple writers will feel inconsistent even when the visual design is perfectly applied.
Making a Style Guide That Gets Used
The fundamental failure of most style guides is that they are produced and filed — consulted only when someone is unsure about an edge case, rather than used proactively. Style guides that get used are those that are easily accessible (a shared URL rather than a buried PDF), logically organised for quick reference, illustrated with real examples rather than abstract descriptions, and periodically updated as the brand evolves. A style guide that no one uses is worse than no style guide at all, because it creates the illusion of documented standards while allowing inconsistency to compound unchecked.