"washing blue" meaning in English

{
  "head_templates": [
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      "expansion": "washing blue (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "name": "English entries with incorrect language header",
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Laundry",
          "orig": "en:Laundry",
          "parents": [
            "Cleaning",
            "Home",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A bluing (an agent used in laundering)."
      ],
      "id": "en-washing_blue-en-noun-lMfVduPE",
      "links": [
        [
          "bluing",
          "bluing"
        ]
      ],
      "synonyms": [
        {
          "word": "laundry blue"
        },
        {
          "word": "dolly blue"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-uː"
    }
  ],
  "word": "washing blue"
}

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  "head_templates": [
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      "expansion": "washing blue (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "Rhymes:English/uː",
        "Rhymes:English/uː/3 syllables",
        "en:Laundry"
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      "glosses": [
        "A bluing (an agent used in laundering)."
      ],
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        [
          "bluing",
          "bluing"
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        "uncountable"
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  "sounds": [
    {
      "rhymes": "-uː"
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  "synonyms": [
    {
      "word": "laundry blue"
    },
    {
      "word": "dolly blue"
    }
  ],
  "word": "washing blue"
}