RGB <-> CIE-LCh API

Converts between sRGB/hex and CIE-LCh (cylindrical LAB: lightness, chroma, hue), both directions, exposing the LAB intermediate. Answers 'What is the LCh of this color?', 'How saturated (chroma) is it perceptually?'

Price$0.04per request

MethodPOST

Route/v1/design/lch-convert

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

colorlchcielchchromahuelabperceptualconvertdesign

API URLhttps://x402.hexl.dev/v1/design/lch-convert

Integration docs

Example request

{
  "color": "#ff6347"
}

Example response

{
  "direction": "rgb->lch",
  "input": "#ff6347",
  "hex": "#ff6347",
  "rgb": {
    "r": 255,
    "g": 99,
    "b": 71
  },
  "hsl": {
    "h": 9.13,
    "s": 100,
    "l": 63.92
  },
  "lab": {
    "L": 62.207,
    "a": 57.851,
    "b": 46.42
  },
  "lch": {
    "L": 62.207,
    "c": 74.173,
    "h": 38.744
  }
}

Input schema

{
  "type": "object",
  "properties": {
    "color": {
      "type": "string",
      "examples": [
        "#ff6347"
      ]
    },
    "lch": {
      "type": "object",
      "properties": {
        "L": {
          "type": "number"
        },
        "c": {
          "type": "number"
        },
        "h": {
          "type": "number"
        }
      }
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}