mcp-registry/io.github.rnvizion/rnv-color-mcp · v3.4.7
Also listed as awesome/rnvizion/rnv-color-mcp, glama/rnvizion/rnv-color-mcp
As of 2026-10-20 08:50 UTC, the Rnvizion Rnv Color MCP server is up with a Glimind reliability score of 80/100 (grade B). Over the last 30 days it answered 99.7% of Glimind's liveness checks. It had 17 outages in 90 days, with a median recovery of 8 minutes.
A complete color workflow over MCP: mix, convert, harmonize, measure, and remember palettes.
Claude Code
claude mcp add --transport http rnvizion-rnv-color-mcp-server https://rnvizion-rnv-color-mcp.hf.space/mcp
Claude Desktop · Windsurf · Cline (mcpServers JSON)
{
"mcpServers": {
"rnvizion-rnv-color-mcp-server": {
"type": "http",
"url": "https://rnvizion-rnv-color-mcp.hf.space/mcp"
}
}
}
Third-party server, listed as discovered. Review its source before installing.
10 of 10 tool(s) carry no readOnlyHint/destructiveHint annotations.
Annotate read-only tools with {"readOnlyHint": true}. Agents and gateways can then run them without a confirmation prompt, and route around destructive ones. How to fix →
17 parameter(s) across 8 tool(s) have no description.
Add a "description" to each parameter with its format and an example ("ISO 8601 date, e.g. 2026-10-17"). This is the commonest cause of wrong arguments on the first call. How to fix →
Handshake + tools/list takes ~1,511 ms.
Serve tools/list from memory, keep the process warm, and host close to your users. Every new agent session pays this before its first call.
In the last 30 days: 0 tool(s) removed and 1 schema change(s).
Add new tools or optional parameters instead of renaming or removing; deprecate first (say so in the description) and remove later. Agents cache tool contracts. How to fix →
Paste-ready definitions with the problems above fixed. Changes marked verify need a human look. 8 tool(s) still need parameter descriptions written by someone who knows the API. All of them as JSON: /v1/readiness/mcp-registry%2Fio.github.rnvizion%2Frnv-color-mcp/fixes
{
"name": "contrast_check",
"description": "WCAG contrast ratio between a foreground and background color, for accessibility. Both accept a hex, CSS name, RNV brand name, or saved-palette reference. Returns the ratio (1.0-21.0) plus pass/fail for AA and AAA at normal and large text sizes and for UI components. Read-only and deterministic, with no side effects. Use this for legibility and accessibility checks; to measure raw perceptual difference between two colors rather than readability use color_difference instead.",
"inputSchema": {
"type": "object",
"required": [
"foreground",
"background"
],
"properties": {
"background": {
"type": "string"
},
"foreground": {
"type": "string"
}
},
"additionalProperties": false
},
"annotations": {
"readOnlyHint": true
}
}{
"name": "convert_color",
"description": "Convert a color between formats. Input accepts a hex, CSS name, RNV brand name, or saved-palette reference. With `to` set to one of hex/rgb/hsv/hsl/lab, returns just that format; leave `to` out to get all of them. hsv and hsl are fractions from 0 to 1, hue included (multiply hue by 360 for degrees). Read-only and deterministic, with no side effects. Use for format conversion of a single color; to blend several colors into one use mix_colors, and to compare two colors use color_difference.",
"inputSchema": {
"type": "object",
"required": [
"color"
],
"properties": {
"to": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"default": null
},
"color": {
"type": "string"
}
},
"additionalProperties": false
},
"annotations": {
"readOnlyHint": true
}
}{
"name": "get_palette",
"description": "Retrieve one saved palette by name, returning its colors and metadata. Returns null if no palette by that name exists. Read-only; no side effects. Use when you already know the palette name; to list available names first use list_palettes, and to create or update a palette use save_palette.",
"inputSchema": {
"type": "object",
"required": [
"name"
],
"properties": {
"name": {
"type": "string"
}
},
"additionalProperties": false
},
"annotations": {
"readOnlyHint": true
}
}Get an email or webhook when this server's readiness drops by 10+ points, tool-poisoning text appears, or a tool breaks:
curl -X POST https://glimind.com/v1/subscriptions -H 'content-type: application/json' -d '{"tools":["mcp-registry/io.github.rnvizion/rnv-color-mcp"],"email":"[email protected]"}'Agents: watch_tool({"toolId": "mcp-registry/io.github.rnvizion/rnv-color-mcp"}) over MCP.
save_palette ~422 tokensmix_colors ~230 tokenscolor_difference ~210 tokensplace_lightness ~204 tokensconvert_color ~201 tokensStatic checks of the advertised tools/list (schema, descriptions, annotations, tool-poisoning patterns, names, size) plus observed protocol, uptime, latency and contract changes. Read-only: no tool is ever called. Weights: schema 15, docs 20, safety 15, efficiency 15, compatibility 15, protocol 5, reliability 10, stability 5. Token counts are estimates (~3.6 characters per token).
Operator? Fix these, then re-check live. Embed the readiness badge:
[](https://glimind.com/server/mcp-registry%2Fio.github.rnvizion%2Frnv-color-mcp?ref=badge)
<a href="https://glimind.com/server/mcp-registry%2Fio.github.rnvizion%2Frnv-color-mcp?ref=badge"><img src="https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.rnvizion%2Frnv-color-mcp.svg" alt="MCP agent-readiness"></a>
.. image:: https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.rnvizion%2Frnv-color-mcp.svg :target: https://glimind.com/server/mcp-registry%2Fio.github.rnvizion%2Frnv-color-mcp?ref=badge :alt: MCP agent-readiness
Glimind records every version of this server's tool definitions in a signed, append-only transparency log. Current manifest sha256:0ac7a4e22054698c…, first seen 2026-10-17, included at leaf 197 of 31,909. Version history · verify what your client received.
Compare: most reliable media servers · most reliable data servers · most reliable other servers · most reliable productivity servers
Glimind tells agents whether a server is up right now and how to call it, then fails over to a live alternative when it isn't.
Claude Code
claude mcp add --transport http glimind https://glimind.com/mcp
Claude Desktop · Windsurf · Cline (mcpServers JSON)
{
"mcpServers": {
"glimind": {
"type": "http",
"url": "https://glimind.com/mcp"
}
}
}
As of 2026-10-20 08:50 UTC, the Rnvizion Rnv Color MCP server is up with a Glimind reliability score of 80/100 (grade B). Over the last 30 days it answered 99.7% of Glimind's liveness checks. It had 17 outages in 90 days, with a median recovery of 8 minutes.
Rnvizion Rnv Color MCP server advertises 10 tools, including color_difference, contrast_check, convert_color, generate_harmony, get_palette.
Point your MCP client at this streamable-http endpoint: https://rnvizion-rnv-color-mcp.hf.space/mcp
Glimind scanned all 10 tool definitions for tool-poisoning patterns — hidden or invisible characters, instructions that override the model, concealment from the user, requests to read credential or MCP config files, conversation exfiltration and cross-tool shadowing — and found none. This checks what the server tells the model, not what its code does; review the source before granting access to sensitive data.
Status page: 90-day uptime, every outage and how long it lasted.
Claim this listing to get the Verified operator marker, a remediation checklist and owner analytics, or embed the live badge from any of the tool pages above. Maintainers: alerts, deploy attestation and monthly reports.
Status is an automated estimate from Glimind's liveness checks (handshake and tool listing only; no tool is ever called) and may lag or differ from your network. Glimind is not affiliated with this server or its operator. Operator? Request a correction or opt out at https://glimind.com/opt-out.