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100
MCP live MCP 2025-11-25 streamable-http

Chart Color System

io.github.socraticstatic/chart-color-system

Solve, audit and simulate colorblind-safe chart palettes. WCAG contrast, OKLab ΔE. Read-only.

Watch this dependency Share evidence report
Uptime
100.0%
5 direct probes · 30d
Response
872ms
last probe
Tools
4
callable
Resources
0
readable
Prompts
0
available
Primary URL
https://chart-color-mcp.vercel.app/mcp
Score: 100/100
Handshake verified by our own probe.
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
4 tools, 0 resources, 0 prompts returned.
pass 3 or more catalogue items 10/10
4 items in total; 3 or more earns these points.
pass Describes itself 10/10
93 characters; more than 30 earns these points.

Tools · 4

solve_palette

Generate a categorical chart palette of n colors (1-12) that maximizes perceptual separation under normal vision and colorblindness, with the given brand colors locked as anchors in slot order. Return…

audit_palette

Audit existing chart colors for accessibility: pairwise OKLab separation under normal vision, deuteranopia, protanopia, tritanopia and achromatopsia, plus WCAG 2.2 non-text contrast (3:1) of every col…

simulate_palette

Show what each color looks like to readers with deuteranopia, protanopia, tritanopia or achromatopsia (published Machado 2009 matrices), so an assistant can describe or render the palette as a colorbl…

build_ramp

Build an evenly spaced perceptual (OKLab) color scale: sequential from start to end, or diverging from start through mid to end. Returns the steps and a background-contrast audit (pairwise separation …

How to use

Claude Desktop or claude.ai: add a custom connector (Customize → Connectors; on Team and Enterprise plans an owner adds it under Organization settings → Connectors) with this server URL: https://chart-color-mcp.vercel.app/mcp

Cursor or Cline: add to your MCP config:

{
  "mcpServers": {
    "chart_color_system": {
      "url": "https://chart-color-mcp.vercel.app/mcp",
      "transport": "streamable-http"
    }
  }
}