# Brand kit: Colour | Slingshot

> Slingshot is building agentic brand systems: a brand delivered as files, MCP servers and CLIs that people and agents both work from.

Ink on paper, with one quiet grey. The values are in `tokens.json`.

| Token | Use |
| --- | --- |
| `paper` | Page background. |
| `ink` | Text, the mark, rules. |
| `stone` | Quiet text: labels, captions, secondary lines. |
| `surface` | Panels a shade darker than the page. |
| `line` | Hairline rules between rows. |

## Rules

- **Use only the tokens, never a raw colour value.** Because a retune changes the token once, and a hard-coded value stays behind on the old colour.
- **Keep the page paper and the text ink.** Because the brand reads as a document, and contrast this high works for every reader.
- **Use no accent colour.** Because an accent would compete with the content, which is the only thing a Slingshot page asks you to look at.
- **Use stone only for text that can be skipped.** Because stone is the one step down from ink, and using it for main copy flattens the hierarchy.
- **Keep text at WCAG AA contrast or better (4.5:1).** Because stone on paper is about 5:1 and stays readable; lighter greys do not.

## Where it lives

- Read this guide as published: https://github.com/slingshot-fyi/brand-kit/blob/v0.1.0/brand/color.md
- All guides: https://slingshot.fyi/kit

## Pages

- [Home](https://slingshot.fyi/): Slingshot is building agentic brand systems: a brand delivered as files, MCP servers and CLIs that people and agents both work from.
- [Agent index](https://slingshot.fyi/ai): Server-rendered company facts, page links and guidance for agents.
- [Brand kit](https://slingshot.fyi/kit): Slingshot’s own brand, built as an agentic brand system: the guides, tokens, MCP server and CLI we are building, used on Slingshot first.
- [Brand kit: Voice](https://slingshot.fyi/kit/voice): Slingshot writes like a plain, careful engineer: specific claims, full sentences, nothing inflated.
- [Brand kit: Layout](https://slingshot.fyi/kit/layout): One centred column on an empty page, read from top to bottom.
- [Brand kit: Typography](https://slingshot.fyi/kit/typography): Three faces with separate jobs. Families and sizes are in tokens.json.
- [Brand kit: Colour](https://slingshot.fyi/kit/color): Ink on paper, with one quiet grey. The values are in tokens.json.
- [Brand kit: Mark](https://slingshot.fyi/kit/mark): The mark is a slingshot's fork with the stone just above it, already let go: mark.svg, drawn on a 24 by 28 grid. mark.png is the same mark on paper at 512px, for avatars.

## When to use

- **Make a brand usable by AI agents:** Slingshot turns a brand into files, tokens, an MCP server and a CLI, so the agents a team already uses can make on-brand pages, decks and copy without guessing.

## How to use

1. Email hey@slingshot.fyi with a short brief: what you are building, who it is for, and when you need it.

## Agent files

- [llms.txt](https://slingshot.fyi/llms.txt)
- [Sitemap](https://slingshot.fyi/sitemap.xml)
- [Robots policy](https://slingshot.fyi/robots.txt)