# Palette Rules

1. Use registered palette tokens only.
2. Add new colors only by updating this library and `assets/definitions/palettes/*.palette.yaml`.
3. Keep hero identity colors out of enemy base palettes.
4. Keep danger, warning, healing, success, and failure stable across UI and gameplay.
5. Use hue shifting: warm highlights, local mids, cool shadows.
6. Test at 100%, 75%, 50%, and 25%.
7. Accessibility variants must preserve value contrast and icon support.

## Contrast targets

| Use | Minimum target |
| --- | --- |
| UI text | 4.5:1 |
| Critical UI text | 7:1 |
| Hero silhouette | 4.5:1 against active background |
| Enemy silhouette | 3.5:1 against active background |
| VFX impact frame | High local contrast, one-frame readability |