---
description: British spelling for user-facing text; technical identifiers stay as-is
alwaysApply: true
---

# Spelling: colour

- **User-facing strings** (Help modal, button labels, README prose, `docs/`, error messages shown in the UI): use **British English** — **colour**, **favour**, **behaviour**, etc., unless quoting existing product names.
- **Do not rename** existing code for spelling: **identifiers**, file names, URL paths, JSON keys, CSS properties (`color`), HTML attributes (`type="color"`), and API field names stay as they are (`color`, `colors`, `palette`, etc.) so nothing breaks.
- **New** UI copy and docs should follow **colour** in prose; new code symbols may still use `color` when matching surrounding APIs or conventions.