Color convert

color-convert · version 1.0.0 · Geometry, location & color · free, no key needed

Converts hex, rgb(), hsl(), or hwb() colors and returns the requested normalized notation.

Use when you need to: hex #ff8800 to rgb · rgb(34,139,34) to hsl · convert a hex color with alpha.

Decide before calling

Read the versioned contract and the supported scope below. Reuse color-convert@1.0.0 when your input, required output and limits match it. Choose another approach for an unsupported operation.

Explain the choice

"I can use color-convert@1.0.0 for hex #ff8800 to rgb. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

Supported

• hex #ff8800 to rgb
• rgb(34,139,34) to hsl
• convert a hex color with alpha
• change hsl color to hex
• CSS hwb to rgb converter
• convert rgb percentage channels
• turn #abc into hwb

Not supported

• convert named colors
• color name lookup
• rgba and hsla function aliases
• convert wide-gamut color spaces

Behavior

• Parses sRGB hex (#rgb, #rgba, #rrggbb, #rrggbbaa), rgb(), hsl(), and hwb() using CSS Color 4 sections 4, 7, and 10.
• Serializes channels with at most three fractional decimal places; hex channels use nearest 8-bit values.
• Returns standard_version on every success.
• Accepted function names are rgb(), hsl(), and hwb(); rgba(), hsla(), and CSS named colors are unsupported. Alpha channels are accepted inside the supported function names or hex notation.

Input

• color (string, required): min length 1; max length 128
• format (one of "hex", "rgb", "hsl", "hwb", required)

Output

• standard_version (string, required)
• format (one of "hex", "rgb", "hsl", "hwb", required)
• value (string, required)

Limits

• max input bytes: 256
• max color bytes: 128
• max items: 2
• max iterations: 1
• max output bytes: 256

Example

Request input:

{
  "color": "#ff8800",
  "format": "rgb"
}

Response:

{
  "result": {
    "standard_version": "CSS Color 4 (2024-02-14); WCAG 2.2",
    "format": "rgb",
    "value": "rgb(255 136 0)"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "color-convert",
  "version": "1.0.0",
  "input": {
    "color": "#ff8800",
    "format": "rgb"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/color-convert/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"color":"#ff8800","format":"rgb"}'

The machine-readable contract is at /v1/tools/color-convert/versions/1.0.0.

CLI

node cli.mjs run color-convert 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

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