color-material-lighting-direction git:20260905.f7824baA

Immutable. This exact content never changes and is served at /api/v1/blob/f918ad3f158e7526.

---
name: "color-material-lighting-direction"
description: "Define palette, material and lighting roles."
---

# Color Material Lighting Direction

## Purpose

Make palette, surface, and lighting choices support the site concept and readability.

## Required Use

Use this skill when the trigger description applies. Keep the `SKILL.md` lean, then read `references/color-material-lighting-direction-guide.md` for concrete rules before planning or editing a meaningful website change.

## Scoped execution

Apply the [shared web contract](../website-operating-rules/references/scoped-web-contract.md) once when execution crosses phases; reuse it if already read. Load only the specialist guidance relevant to the requested surface and deliverable.

## Detailed Guide

Read `references/color-material-lighting-direction-guide.md` when this skill is active for a build, redesign, review, or implementation plan.