{
  "id": "blue.color",
  "term": "blue",
  "sense": "color",
  "pos": "adjective",
  "status": "review",
  "level": 12,
  "arena": "EmergenceLexicon",
  "domain": "everyday",
  "style": null,
  "definition": "a color visual that arises when light interacts with air as a material medium",
  "folk_gloss": null,
  "emergence": {
    "components": [
      "light.visual",
      "air.material",
      "interaction.process",
      "color.visual",
      "material.physical",
      "results.outcome",
      "medium.level",
      "visual.perceptual"
    ],
    "interaction": "Light and air interact as co-constituents within a medium, transforming the visual field through scattering, which results in a perceived color.",
    "novel_properties": [
      "scattered wavelength perception",
      "sky-dependent hue",
      "atmospheric depth effect"
    ]
  },
  "examples": [
    {
      "text": "Rayleigh scattering makes the sky appear blue when sunlight passes through Earth's atmosphere.",
      "domain": "physics"
    },
    {
      "text": "The blue hue of glacial ice emerges from dense ice absorbing other wavelengths while scattering blue light.",
      "domain": "geology"
    },
    {
      "text": "Blue LEDs became practical in 1993 when Shuji Nakamura achieved efficient blue light emission using gallium nitride.",
      "domain": "engineering"
    }
  ],
  "relations": [
    {
      "id": "color.visual",
      "note": "is-a",
      "type": "contrasts-with"
    },
    {
      "id": "red.color",
      "note": "contrasts-with",
      "type": "contrasts-with"
    }
  ],
  "used_by": [
    "brown.color"
  ],
  "forms": [
    "blue",
    "blues"
  ],
  "closed": false,
  "provenance": {
    "author": "openrouter:openai/gpt-oss-120b",
    "date": "2026-07-29",
    "confidence": 0.6,
    "reconciled": {
      "by": "openrouter:qwen/qwen3-235b-a22b-2507",
      "date": "2026-07-31",
      "changed": "components",
      "note": "Added missing components 'medium.level' and 'visual.perceptual' which are required by the current definition. Kept definition intact as it accurately describes the phenomenon and relies on these conce"
    }
  },
  "canonical": "https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-blue.color"
}