COLOR_MATRICES.json

{
  "schemaVersion": 1,
  "foundationVersion": "1.1",
  "whitePoint": "D65",
  "sRGBToXYZ": {
    "matrix": [
      [0.4124564, 0.3575761, 0.1804375],
      [0.2126729, 0.7151522, 0.0721750],
      [0.0193339, 0.1191920, 0.9503041]
    ],
    "description": "sRGB to XYZ conversion matrix (D65 white point)"
  },
  "xyzToLab": {
    "referenceWhite": {
      "Xn": 0.95047,
      "Yn": 1.00000,
      "Zn": 1.08883
    },
    "delta": 0.20689655172413793,
    "description": "XYZ to Lab conversion parameters (D65 white point)",
    "fFunction": {
      "threshold": 0.008856451679035631,
      "formula": "f(t) = t^(1/3) if t > delta^3 else t/(3*delta^2) + 4/29"
    }
  },
  "note": "These matrices are IMMUTABLE. Any change requires new schemaVersion and new asset class. System/OS color APIs are forbidden."
}