{
  "version": "3.2",
  "methodology": "WFB-ACCOUNTABILITY-SENSOR-GRAPHS-3.2-SEMANTIC-PALETTE",
  "palettePrinciple": "Time bands progress from light daylight blue through twilight violet to dark midnight navy.",
  "timeBandColourOrder": [
    "day",
    "evening",
    "night"
  ],
  "colours": {
    "day": {
      "hex": "#B9DDF2",
      "meaning": "Day 06:00–17:59",
      "designReason": "Light sky blue reflects daylight and visually recedes."
    },
    "evening": {
      "hex": "#7566A8",
      "meaning": "Evening 18:00–21:59",
      "designReason": "Twilight violet represents the transition from day to night."
    },
    "night": {
      "hex": "#102A43",
      "meaning": "Night 22:00–05:59",
      "designReason": "Midnight navy is the darkest time-band colour."
    },
    "overnightBurden": {
      "hex": "#102A43",
      "meaning": "Average overnight truck passings and overnight exposure"
    },
    "truckShare": {
      "hex": "#C65D1E",
      "meaning": "Truck share of classified traffic"
    },
    "allDayTruckRate": {
      "hex": "#2C7A7B",
      "meaning": "Average all-day truck passings"
    },
    "selectedHeading": {
      "hex": "#2C6E75",
      "meaning": "Heading selected for the comparable corridor metric"
    },
    "otherHeading": {
      "hex": "#B8C2CC",
      "meaning": "Other heading at the same source-site ID; not selected"
    }
  }
}