Color Brightness Skill

What this skill does

Let your agent judge color contrast. Call it as an MCP tool to get WCAG luminance, a light/dark verdict and accessible text colors from any hex. You switch it on with a single toggle — no SDK and no endpoint wiring — and it answers over MCP or REST using the same key as every other skill.

See it work

A real response from the Color Brightness Skill — exactly what your agent gets back when it makes the call.

vervekit · colorbrightnesstool call

{
  "hex": "FF5733"
}

result

hex: #FF5733
rgb: { … }
luminance: 0.2832
perceived_brightness: 131
yiq: 133.13
is_light: false
is_dark: true
brightness_category: dark

+7 more fields

Run it with your own input. Live calls happen in your dashboard, on your key.

Ways to use it

Trusted facts in one call

Enable Color Brightness and your app can add color brightness to your app from a live source instead of shipping a lookup table you have to keep current.

A tool agents call for ground truth

Over MCP, your model calls colorbrightness to fetch a reference value at the moment it needs it, rather than recalling it imperfectly.

REST from any stack

Call Color Brightness directly to add color brightness to your app inline, one key across every skill.

Use it in your app

Once enabled, this skill is reachable two ways — pick whichever fits how you build. Both use the same key.

For AI agentsMCP

It appears to your model as a callable tool. No extra code — the agent invokes it when a task needs it.

colorbrightness

For apps & backendsREST

Call it from your server with one request and your key. Node, Python, Go — anything that can send a GET.

GET /v1/colorbrightness

Ask your agent

“Enable Color Brightness and ask your agent to add color brightness to your app.”
“Use the Color Brightness skill for me.”

Color Brightness Skill, answered

How to connect it over MCP or REST.

How do I add Color Brightness to my app or agent?

Enable the Color Brightness Skill on VerveKit, then reach it two ways with the same key: over MCP (it appears to your agent as the colorbrightness tool) or over REST (call it from any backend). No SDK to install and no endpoint to wire.

MCP or REST — which should I use?

Both work off one key. Use MCP when an AI agent should decide when to add color brightness to your app — the skill shows up as a callable tool. Use REST when your own server-side code should call it directly. Many apps use both.

Which agents and frameworks does it work with?

Any MCP client — Claude, Cursor, LangChain, and custom agents all speak the Model Context Protocol, so Color Brightness appears as a standard tool with nothing skill-specific to integrate.

How many credits does a Color Brightness call cost?

Each call costs 1 credit. Every skill rides the same key and the same connection, so enabling more skills doesn't add more integrations to manage.

Do I need to install anything?

No SDK and no endpoint wiring — enabling the skill is a toggle. You point your agent at the VerveKit MCP endpoint (or call REST) and Color Brightness is available immediately.

Where does the data come from, and what shows on my bill?

VerveKit runs on APIVerve, our production data engine; Color Brightness is one of 300+ skills on the same key. Invoices and card statements show APIVERVE.

Trusted facts in one call

A tool agents call for ground truth

REST from any stack

Color Brightness Skill, answered

Give your software a way to act on the world.

Scaling in production?