Find detailed information and a test-playground on the dedicated site: https://colormcp.colorcontrol.ai
ColorMCP —
Professional Color Management and Press Calibration for AI Assistants
Color management has always required specialized knowledge, expensive software, and years of experience to get right. ColorMCP changes that by making professional-grade color science available directly inside any AI assistant that supports the Model Context Protocol (MCP).
Whether you are a prepress specialist, a print engineer, a RIP operator, or a developer building color-aware workflows, ColorMCP gives your AI assistant the tools to compute, convert, calibrate, and analyze color — accurately, and without requiring a separate application.
What Is ColorMCP?
ColorMCP is a free MCP server hosted at https://colormcp.colorcontrol.ai/free. Once connected to a compatible AI client — such as Claude Desktop, Cursor, OpenCode, or any MCP-compatible application — your AI gains access to over 60 specialized color management tools. These tools cover everything from basic color space conversions to full colorimetric press calibration workflows.
The server is built and maintained by Reprointelligence, a company specializing in color science and printing standardization. All calculations follow established international standards including ISO 13655, ISO 12647, CGATS TR015, and CIE publications.
Color Space Conversions
At its foundation, ColorMCP provides a comprehensive set of color space conversion tools. It supports HEX, RGB, HSL, CIELAB (D50 and D65), CIELCH, CIE XYZ, CIE xyY, CIE Luv, CIE LCHuv, and the full DIN99 family of color spaces including DIN99, DIN99b, DIN99c, DIN99d, and DIN99o.
Rather than requiring users to know the exact conversion path between two color spaces, ColorMCP includes a BFS-based navigation tool that automatically finds the shortest conversion route between any two supported spaces and returns the sequence of tool calls needed to get there. If you want to go from a HEX value to CIE Luv, the router tells you exactly which steps to take.
Delta E Color Difference Calculations
ColorMCP supports all major perceptual color difference formulas used in industry and standardization:
Delta E 1976 (CIE76) — the original Euclidean distance formula in CIELAB space. Delta E 1994 (CIE94) — an improved formula with weighted coefficients for lightness, chroma, and hue. Delta E 2000 (CIEDE2000) — the current ISO standard formula, used in most modern color management workflows and press acceptance criteria. Delta E CMC — used in textile and some print applications. Delta E DIN99o — a perceptual color difference formula based on the DIN99o uniform color space, offering excellent visual uniformity.
Press Calibration — ISO 12647 and TTVP-S
For print production, ColorMCP provides a complete set of tone value calibration tools based on ISO 12647 and the TTVP-S (Target Tone Value Percentage — Setpoint) method.
The press calibration tools allow operators to look up standard TTVI50 targets for named printing conditions such as Fogra39, Fogra51, GRACoL2013, and CRPC6. They can compute the correction curves needed to linearize a press against a chosen standard, handling both single-channel calibration and full CMYK ramps in a single call.
The tools support area coverage input, TVI/dot gain input, and dithering options for 8-bit RIP linearization tables — covering the practical requirements of offset, flexo, and digital press workflows.
CGATS TR015 and G7 Gray Balance
ColorMCP includes a dedicated set of tools for the CGATS TR015 calibration method, which forms the technical basis of the G7 gray balance standard used widely in North America and increasingly in international packaging production.
These tools compute CMY gray balance triplets for any Cyan setpoint, generate complete NPDC (Neutral Print Density Curve) target tables, and calculate per-channel calibration corrections. A workflow guide tool walks AI assistants through the correct sequence of tool calls for a full CGATS TR015 calibration session, making it accessible even to users who are not familiar with the standard.
Colorimetric Press Calibration
One of the most powerful features of ColorMCP is its colorimetric calibration system, powered by Reprointelligence. Unlike density-based calibration, colorimetric calibration uses ICC reference profiles and measured CIELAB values to compute correction deltas that bring a press into agreement with a reference printing condition.
Supported conditions for CMYK and spot color workflows include Fogra39, GRACoL2013 / CRPC6, Uncoated, and Packaging. For RGB output devices such as inkjet proofing systems, AdobeRGB and sRGB reference conditions are available.
The system also supports substrate-relative gray balance scaling, where the neutral aim is proportionally adjusted based on the measured paper white — a technique defined in CGATS TR015 that improves gray balance accuracy on tinted substrates.
RLTV Spot Color Calibration
For spot color and digital printing scenarios, ColorMCP implements the RLTV (Robust Linear Tone Value) formula developed by Reprointelligence. RLTV is a colorimetric area coverage method that works correctly across saturated, unsaturated, and light pastel spot colors alike — a significant improvement over the SCTV formula, which is limited to saturated colors and shows known discrepancies in real-world applications.
Users provide CIE XYZ or CIELAB measurements for the unprinted substrate, the solid ink, and each halftone patch. The tool returns the actual colorimetric area coverage per patch and the correction delta needed to linearize the tone curve. No spectrophotometer software is required — measurements from any ISO 13655 M2 instrument can be used directly.
ICC Profile Lookup
ColorMCP can perform forward and inverse ICC profile lookups directly inside the AI chat. Users supply a profile filename and device channel values to retrieve the corresponding CIELAB output, or supply a CIELAB value to find the nearest device values through the inverse transform. Supported color spaces include RGB, CMYK, and 7-color profiles.
How to Connect ColorMCP to Your AI Assistant
Connecting ColorMCP takes less than two minutes. Add the following MCP server endpoint to your AI client configuration:
https://colormcp.colorcontrol.ai/free
For Claude Desktop, this goes into the claude_desktop_config.json file under mcpServers. For Cursor, it goes into the MCP settings in the project or global configuration. For OpenCode, add it under the mcp section of opencode.json. Detailed setup instructions for all supported clients are available on the ColorMCP landing page.
Once connected, your AI assistant can immediately call any of the available tools. No API key is required for the free endpoint.
Who Is ColorMCP For?
ColorMCP is built for anyone working at the intersection of color science and professional printing. Prepress operators can use it to compute calibration corrections without leaving their chat interface. Print engineers can verify press conformance against ISO standards in seconds. Developers building color-aware pipelines can integrate accurate color math into their AI workflows without implementing the underlying formulas themselves. Educators and consultants can demonstrate color management concepts interactively.
The free endpoint covers the complete core toolset. A premium tier focused on advanced press process control — covering density-based workflows, ink key settings, and specialized production knowledge — is in development under the PrintMCP brand.
Is there Service and professional Support availabe?
Yes. Reprointelligence provides professional (paid) user support at our regular support rates.
About Reprointelligence
ColorMCP is developed and maintained by Reprointelligence, a company with deep roots in color science and printing standardization. The RLTV formula and several of the calibration methodologies implemented in ColorMCP originate from Reprointelligence research and are made available here as practical tools for the printing industry.