Web Interface Guidelines Reviewer
vercel-labs/openreview
Review UI code for Web Interface Guidelines compliance. Use when asked to "review my UI", "check accessibility", "audit design", "review UX", or "check my…
Color science expert skill with 286K words of reference material covering OKLCH/OKLAB, palette generation, accessibility/contrast, color naming, pigment mixing, and historical color theory.
Install Color Expert
$ npx skills add nexu-io/open-design --skill color-expert -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install nexu-io/open-design color-expert --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/color-expert .claude/skills/color-expert && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "color-expert" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/color-expert into .claude/skills/color-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "color-expert", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/nexu-io/open-design/tree/main/skills/color-expertType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add nexu-io/open-design --skill color-expert -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install nexu-io/open-design color-expert --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/color-expert .agents/skills/color-expert && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "color-expert" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/color-expert into .agents/skills/color-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "color-expert", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add nexu-io/open-design --skill color-expert -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install nexu-io/open-design color-expert --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/color-expert .cursor/skills/color-expert && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "color-expert" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/color-expert into .cursor/skills/color-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "color-expert", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/nexu-io/open-design.git --path skills/color-expert--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add nexu-io/open-design --skill color-expert -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install nexu-io/open-design color-expert --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/color-expert .gemini/skills/color-expert && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "color-expert" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/color-expert into .gemini/skills/color-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "color-expert", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install nexu-io/open-design color-expertInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add nexu-io/open-design --skill color-expert -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/color-expert .github/skills/color-expert && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "color-expert" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/color-expert into .github/skills/color-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "color-expert", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add nexu-io/open-design --skill color-expert -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install nexu-io/open-design color-expert --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/color-expert .opencode/skills/color-expert && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "color-expert" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/color-expert into .opencode/skills/color-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "color-expert", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
color-expert- GitHub stars
- 100k
- Token cost
- ~331 tokens
- SKILL.md length
- 99 words
- Files
- 1
- Skills in repo
- 245
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Color science expert skill with 286K words of reference material covering OKLCH/OKLAB, palette generation, accessibility/contrast, color naming, pigment mixing, and historical color theory.
- Tasks that involve Accessibility
- SKILL.md covers What it does, Source and How to use
- Reaches github.com
What it does
Color Expert is an agent skill from nexu-io/open-design. Color science expert skill with 286K words of reference material covering OKLCH/OKLAB, palette generation, accessibility/contrast, color naming, pigment mixing, and historical color theory.
Its SKILL.md is about 330 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Frontend & Design, covering Accessibility. The repository describes itself as: 🎨 Best DeepSeek Harness Design Plugin. The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes… The licence is Apache-2.0.
When your agent uses it
- Tasks that involve Accessibility
Example prompts
- “/color-expert”
What it can do on your machine
Read from SKILL.md and the folder at commit 17e2559. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
github.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Color Expert loads about 331 tokens when it runs. Until then it costs about 51 tokens; SKILL.md has 99 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from nexu-io/open-design at commit 17e2559, republished under its Apache-2.0 licence (© nexu-io). 99 words, ~331 tokens.
Download SKILL.mdSave it as
.claude/skills/color-expert/SKILL.md (or your agent's skills folder).- name
- color-expert
- description
- Color science expert skill with 286K words of reference material covering OKLCH/OKLAB, palette generation, accessibility/contrast, color naming, pigment mixing, and historical color theory.
- triggers
- color theory, palette generator, color science, oklch palette, contrast check
- od.mode
- design-system
- od.category
- design-systems
- od.upstream
- https://github.com/meodai/skill.color-expert
color-expert
Curated from @meodai.
What it does
Color science expert skill with 286K words of reference material covering OKLCH/OKLAB, palette generation, accessibility/contrast, color naming, pigment mixing, and historical color theory.
Source
- Upstream: https://github.com/meodai/skill.color-expert
- Category:
design-systems
How to use
This catalogue entry advertises the skill in OpenDesign so the agent discovers it during planning. To run the full upstream workflow with its original assets, scripts, and references, install the upstream bundle into your active agent's skills directory:
# Inspect the upstream README for exact paths
open https://github.com/meodai/skill.color-expertThen ask the agent to invoke this skill by name (color-expert) or with
one of the trigger phrases listed in this skill's frontmatter.
© nexu-io, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/color-expert of nexu-io/open-design.
Open the folder on GitHubat commit 17e2559
Compare with similar skills
Color Expert next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Color Expert this skillnexu-io/open-design | 100k | — | ~331 | Automated safety check: Pass | Apache-2.0 | |
| Web Interface Guidelines Reviewervercel-labs/openreview | 1.7k | 97 repos | ~308 | Automated safety check: Pass | None | |
| Accessibility Reviewmarkmead/hyperui | 12k | 1 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Web Animation DesignbaptisteArno/typebot.io | 11k | 2 repos | ~2.7k | Automated safety check: Pass | Custom licence | |
| Accessibility Fixeribelick/ui-skills | 9.6k | 4 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Wcag Audit PatternsvmDeshpande/ai-agent-automation | 178 | 11 repos | ~610 | Automated safety check: Pass | Apache-2.0 |
Similar skills
- Official
Accessibility Review
markmead/hyperui
Run a WCAG 2.1 AA accessibility audit on a design or page. An agent skill from markmead/hyperui.
Web Animation Design
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Guides easing, timing and animation choices for UI motion, based on a web animation course, and reviews existing animations in a before-and-after table.
Accessibility Fixer
ibelick/ui-skills
Audits and fixes HTML accessibility problems such as ARIA labels, keyboard navigation, focus management, contrast and form errors with minimal changes.
Wcag Audit Patterns
vmDeshpande/ai-agent-automation
Conduct WCAG 2.2 accessibility audits with automated testing, manual verification, and remediation guidance.
Baseline UI
ibelick/ui-skills
Applies a fixed set of UI rules for stack, components, interaction, animation, typography and layout, or reviews a file against them with concrete fixes.
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Related
Categories
Questions about Color Expert
What does Color Expert do?
Color science expert skill with 286K words of reference material covering OKLCH/OKLAB, palette generation, accessibility/contrast, color naming, pigment mixing, and historical color theory. Color Expert is an agent skill from nexu-io/open-design. Color science expert skill with 286K words of reference material covering OKLCH/OKLAB, palette generation, accessibility/contrast, color naming, pigment mixing, and historical color theory.
When should I use Color Expert?
Color Expert fits situations like: tasks that involve Accessibility.
How do I install Color Expert in Claude Code?
Run `npx skills add nexu-io/open-design --skill color-expert -a claude-code`. Or copy the skill folder (skills/color-expert in nexu-io/open-design) into .claude/skills/color-expert in your project. Claude Code loads it when a task matches its description.
How do I install Color Expert in Codex?
Run `npx skills add nexu-io/open-design --skill color-expert -a codex`. Or copy the skill folder (skills/color-expert in nexu-io/open-design) into .agents/skills/color-expert in your project. Codex loads it when a task matches its description.
Can I use Color Expert in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add nexu-io/open-design --skill color-expert -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/color-expert, .gemini/skills/color-expert, .github/skills/color-expert and .opencode/skills/color-expert in your project.
What does Color Expert need to run?
SKILL.md names no scripts, command-line tools or credentials: Color Expert is instructions for the agent only.
Does Color Expert access the network?
SKILL.md names 1 domain. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Color Expert safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Color Expert use?
Color Expert is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Color Expert use?
About 331 tokens (SKILL.md is roughly 1.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Color Expert?
Skills that share tags, products or a category with Color Expert: Web Interface Guidelines Reviewer (vercel-labs/openreview, 1.7k stars), Accessibility Review (markmead/hyperui, 12k stars), Web Animation Design (baptisteArno/typebot.io, 11k stars) and Accessibility Fixer (ibelick/ui-skills, 9.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Color Expert?
nexu-io (a GitHub organization) maintains it in nexu-io/open-design, which has 100,280 GitHub stars. The repository holds 245 skills in this directory. The repository was last updated on October 10, 2026.
Source: nexu-io/open-design on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.