Calculate, review, and generate web color systems using RGB, HSL, LAB, OKLCH, contrast ratios, luminance, opacity, blend modes, and light/dark mode transformations. Use when auditing accessible colors, converting color models, deriving palettes, checking WCAG contrast, building theme tokens, or debugging opacity and CSS blend math.
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---
name: color-math-accessibility
description: "Calculate, review, and generate web color systems using RGB, HSL, LAB, OKLCH, contrast ratios, luminance, opacity, blend modes, and light/dark mode transformations. Use when auditing accessible colors, converting color models, deriving palettes, checking WCAG contrast, building theme tokens, or debugging opacity and CSS blend math."
category: frontend-and-design
source_repo: hashgraph-online/awesome-codex-plugins
source_path: "plugins/LVTD-LLC/skills/skills/color-math-accessibility/SKILL.md"
source_url: https://github.com/hashgraph-online/awesome-codex-plugins/blob/HEAD/plugins/LVTD-LLC/skills/skills/color-math-accessibility/SKILL.md
---
# Color Math Accessibility
Use this skill when colors need to be explainable, accessible, and reproducible. It focuses on color math that affects real UI outcomes: contrast, palette relationships, perceptual lightness, opacity, and blending.
## Quick Start
1. Read `guidelines.md` to select the smallest relevant file set.
2. Load `references/color-systems/rules.md` for implementation decisions.
3. Load `references/color-systems/examples.md` when editing code.
4. Use `workflows/audit-color-system.md` for multi-step derivation or debugging.
## Contents
| Resource | Purpose |
|----------|---------|
| `guidelines.md` | Routes tasks to the right reference files |
| `references/source-map.md` | Book source and chapter/section traceability |
| `references/color-systems/knowledge.md` | Core concepts and terminology |
| `references/color-systems/rules.md` | Practical rules, guidelines, and exceptions |
| `references/color-systems/examples.md` | Bad/good examples and refactoring approach |
| `references/color-systems/patterns.md` | Reusable formula and implementation patterns |
| `references/color-systems/checklist.md` | Review checklist and red flags |
| `workflows/audit-color-system.md` | Step-by-step workflow |
## Source
Derived from *Math for Web Design* by Paul McFedries, Chapter 7: The mathematics of color.
Citations are tracked in `references/source-map.md`.
---
**Source:** [`hashgraph-online/awesome-codex-plugins`](https://github.com/hashgraph-online/awesome-codex-plugins) → `plugins/LVTD-LLC/skills/skills/color-math-accessibility/SKILL.md`
