# Color Math Accessibility

> 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.

- Skill: `thedixitjain/color-math-accessibility` (Agent Skill, multi-file: 10 files)
- Install (CLI): `npx skillmds add thedixitjain/color-math-accessibility`
- Raw SKILL.md: https://api.skillmd.com/api/skills/thedixitjain/color-math-accessibility/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: thedixitjain (https://skillmd.com/u/thedixitjain)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/thedixitjain/color-math-accessibility

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# 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`.

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**Source:** [`hashgraph-online/awesome-codex-plugins`](https://github.com/hashgraph-online/awesome-codex-plugins) → `plugins/LVTD-LLC/skills/skills/color-math-accessibility/SKILL.md`