Zovo Palette Lab MCP Server

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answering

Zovo Palette Lab is answering right now. Last checked 13 min ago. It exposes 3 tools.

WCAG contrast & palettes

Uptime history 67 hours of history

67 hours agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

183 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Zovo Palette Lab every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add contrast-checker --transport http https://contrast-checker.zovo.one/mcp

Settings → Connectors → Add custom connector, then paste this address

https://contrast-checker.zovo.one/mcp

~/.codex/config.toml

[mcp_servers.contrast-checker]
url = "https://contrast-checker.zovo.one/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "contrast-checker": {
      "url": "https://contrast-checker.zovo.one/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "contrast-checker": {
      "type": "http",
      "url": "https://contrast-checker.zovo.one/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

color

check_color_contrast

Use this when the user wants to know whether a text, icon or border colour has enough contrast against a background: a WCAG contrast checker for one colour pair (e.g. "does white text on #F59E0B pass WCAG AA", "contrast ratio of #767676 on white", "what text color for this background"). Returns the computed WCAG 2.x ratio (truncated to 2 decimals, rounded down), AA/AAA results for normal text, large text and UI components, a verdict for a given font size, APCA Lc as draft information, and the nearest passing colours for AA and AAA (darker and lighter, same OKLCH hue and chroma). Accepts hex, 8-digit hex with alpha, rgb(), hsl(), hwb(), lab(), lch(), oklab(), oklch(), color(display-p3 ...) and CSS colour names; wide-gamut colours are clipped to sRGB with a note. Does not read colours from images or web pages, resolve CSS variables or currentColor, or check gradients as a whole (check each stop). For 3 or more colours use check_palette_contrast.

generate

generate_accessible_palette

Use this when the user wants an accessible colour scale or palette built from one colour: "color palette generator from hex", "generate a 50-950 scale from #1E6FD9", "tailwind color palette generator", "accessible color palette for my website". Builds an 11-step 50-950 tonal scale in OKLCH with the base hue, where 50-400 pass AA with black text, 500 passes AA with both white and black text, 600 passes AA with white text and 700-950 pass AAA with white text, and each ratio is reported. Returns CSS custom properties and a Tailwind config as downloads. Does not pick colours by mood or brand meaning and does not extract palettes from images.

palette

check_palette_contrast

Use this when the user has a colour palette (2 to 12 colours) and wants to know which combinations are accessible: "check contrast of my color palette", "which of these colors can I use for text", "accessible color palette checker". Returns the full pairwise WCAG 2.x contrast matrix (ratios truncated, rounded down), which pairs pass AA/AAA for text or 3:1 for large text and UI, and a recommended text colour for each background (a palette colour that passes AA, otherwise black or white). Does not generate new colours; use generate_accessible_palette for a tonal scale and check_color_contrast for fixes to one pair.

Endpoints

URL	Transport	State	Latency	Checked
https://contrast-checker.zovo.one/mcp	streamable-http	answering	186 ms	13 min ago

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Zovo Palette Lab — questions

Answers built from our own checks of this server.

What can Zovo Palette Lab do?

It exposes 3 tools, read directly from the server on our last check. Among them: check_color_contrast, check_palette_contrast, generate_accessible_palette. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Zovo Palette Lab working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 183 ms. The bar chart above shows every period we have measured.

How do I connect Zovo Palette Lab?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Zovo Palette Lab need an API key?

No. Zovo Palette Lab completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Zovo Palette Lab?

It answers our handshake in 183 ms on average, which is faster than 77% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.