Color Space MCP Server: Setup for Claude, Cursor and Other Apps

• Converts a color, or a batch of colors, between any two spaces

  Takes a color as a CSS string or channel values and returns it in another space, using that space's normal ranges. It flags channels that fall outside the target's range and does not clamp them. A batch of up to 1,024 colors works too.

  Try: “Convert #ff8000 to OKLCH.”

  Read · convert

• Writes a color as ready-to-paste CSS strings

  Returns the color as CSS strings such as rgb(), hsl(), lab(), oklch() and color(display-p3 ...), plus a hex code when it fits sRGB. A string comes back empty where CSS would clamp the color into a different one.

  Try: “Give me CSS strings for oklch(0.7 0.1 50), including Display P3.”

  Read · css

• Checks whether a color fits sRGB, Display P3 or Rec. 2020

  Tests a color against sRGB, Display P3 and Rec. 2020 and reports the smallest one that holds it. It only checks membership and does not map the color into a smaller gamut.

  Try: “Is color(display-p3 1 0.5 0) inside sRGB?”

  Read · gamut

• Explains one color space: channels, ranges and sources

  Returns the display name, description, channels with their usual ranges, defining references, year and author, illuminant and observer, and the spaces it converts to directly.

  Try: “Tell me about the OKLCH color space and where it comes from.”

  Read · space

• Searches the catalog of 221 color spaces

  Lists the available color spaces and can filter by a search phrase, family or purpose, with the best matches first.

  Try: “Which color spaces are used for camera log footage?”

  Read · spaces

• Builds a .cube LUT file for a conversion

  Produces a .cube lookup table that works in Resolve, Premiere, Final Cut, OBS or ffmpeg. The header carries the measured deviation from the direct conversion, and the lattice size is limited to 33 here.

  Try: “Make a .cube LUT that converts S-Log3 to Rec. 709.”

  Read · cube

• Writes a color conversion as GLSL, WGSL, HLSL or MSL code

  Returns shader code for a conversion in GLSL, WGSL, HLSL or Metal, with an entry function named after the two spaces and every helper on the path. HLSL and MSL need the optional naga-wasm package installed next to it.

  Try: “Write a GLSL function that converts RGB to OKLCH.”

  Read · shader

• Exports a color space as an ICC profile

  Returns one color space as an ICC v2 profile, encoded in base64. It uses a matrix and tone curve for RGB working spaces and a lookup table for others.

  Try: “Export Display P3 as an ICC profile.”

  Read · icc

• Shows the library call for a conversion and a Python equivalent

  Returns the color-space JavaScript call with its result and, where one exists, the matching colour-science Python code checked against color-space, with any known caveat.

  Try: “Show me the code to convert sRGB 200, 100, 50 to CIELAB in JavaScript and Python.”

  Read · code

Watch out for

• Out-of-range colors are not clamped

  A converted color can fall outside the target space's range, and the result flags each channel instead of fixing it. Check the range flag before using a color in a design. github.com

• HTTP mode listens on localhost

  The optional HTTP mode binds to 127.0.0.1 by default. Leave it on that address unless you add your own protection. github.com

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