What a Style Guide Actually Needs to Contain (and What's Overkill)

A style guide gets requested more often than it gets used, mostly because most of them try to cover everything and end up being referenced by no one. The useful ones are short enough that someone actually opens them before starting new work, not buried in a sixty-page document nobody has time to read.

What actually belongs in a working style guide

• Your color palette, with clear names and clear rules for when each one is used — not just hex codes with no context.
• Your type scale — a small, fixed set of font sizes and weights, so nobody's guessing at a new size for every new element.
• Logo usage rules that prevent the three or four most common mistakes, not every conceivable one.
• Voice and tone guidance in plain language — a few example sentences of how your brand does and doesn't sound, which does more than an abstract adjective list.

What's usually overkill for a smaller brand

Exhaustive component libraries, animation timing specifications, and edge-case documentation for scenarios that haven't come up yet. These earn their place once a team is large enough that inconsistency has become a real, visible cost — the same threshold we describe in why your first version doesn't need a design system.

A style guide's job is to answer the questions people actually ask before starting new work. Anything beyond that is documentation nobody will read.

If you're not sure what belongs in yours, look at the last three times your brand looked inconsistent across different pieces of work — a style guide should exist to specifically prevent those, and not much more.