Perceptual color difference API

Computes perceptual color difference between two colors with all three canonical formulas — CIE76, CIE94, and CIEDE2000 — in LAB, plus a human-readable perceptibility label. Answers 'How different are these two colors perceptually?', 'What is the CIEDE2000 delta-E?'

Price$0.06per request

MethodPOST

Route/v1/design/delta-e

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

colordelta-eciede2000cie76cie94differenceperceptuallabdesign

API URLhttps://x402.hexl.dev/v1/design/delta-e

Integration docs

Example request

{
  "color1": "#ff6347",
  "color2": "#ff7f50"
}

Example response

{
  "color1": "#ff6347",
  "color2": "#ff7f50",
  "lab": {
    "color1": {
      "L": 62.207,
      "a": 57.851,
      "b": 46.42
    },
    "color2": {
      "L": 67.295,
      "a": 45.354,
      "b": 47.493
    }
  },
  "cie76": 13.5357,
  "cie94": 6.9847,
  "ciede2000": 7.0965,
  "perception": "perceptible at a glance",
  "interpretation": "CIEDE2000 ΔE = 7.1 (perceptible at a glance)."
}

Input schema

{
  "type": "object",
  "required": [
    "color1",
    "color2"
  ],
  "properties": {
    "color1": {
      "type": "string",
      "examples": [
        "#ff6347"
      ]
    },
    "color2": {
      "type": "string",
      "examples": [
        "#ff7f50"
      ]
    }
  }
}

Output schema

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