"Nattier blue" meaning in English

{
  "etymology_text": "After the French painter Jean-Marc Nattier.",
  "forms": [
    {
      "form": "Nattier blues",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "Nattier blue (countable and uncountable, plural Nattier blues)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A delicate, moderately pale shade of blue."
      ],
      "id": "en-Nattier_blue-en-noun-kgR85va7",
      "links": [
        [
          "delicate",
          "delicate"
        ],
        [
          "pale",
          "pale"
        ],
        [
          "blue",
          "blue"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "wikipedia": [
        "Jean-Marc Nattier"
      ]
    }
  ],
  "word": "Nattier blue"
}

{
  "etymology_text": "After the French painter Jean-Marc Nattier.",
  "forms": [
    {
      "form": "Nattier blues",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "Nattier blue (countable and uncountable, plural Nattier blues)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English uncountable nouns"
      ],
      "glosses": [
        "A delicate, moderately pale shade of blue."
      ],
      "links": [
        [
          "delicate",
          "delicate"
        ],
        [
          "pale",
          "pale"
        ],
        [
          "blue",
          "blue"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "wikipedia": [
        "Jean-Marc Nattier"
      ]
    }
  ],
  "word": "Nattier blue"
}