"half blue" meaning in English

{
  "forms": [
    {
      "form": "half blues",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "half blue (plural half blues)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "52 48",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Sporting colours awarded by a university or other institution for sporting achievement at a lower level, or in a more minor sport, than that required to receive a full blue, especially and originally at Oxford and Cambridge Universities in England."
      ],
      "id": "en-half_blue-en-noun--~VEqUcF",
      "links": [
        [
          "full blue",
          "full blue"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "52 48",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A person who has been awarded such sporting colours."
      ],
      "id": "en-half_blue-en-noun-5TaFH9r8"
    }
  ],
  "word": "half blue"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns"
  ],
  "forms": [
    {
      "form": "half blues",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "half blue (plural half blues)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "Sporting colours awarded by a university or other institution for sporting achievement at a lower level, or in a more minor sport, than that required to receive a full blue, especially and originally at Oxford and Cambridge Universities in England."
      ],
      "links": [
        [
          "full blue",
          "full blue"
        ]
      ]
    },
    {
      "glosses": [
        "A person who has been awarded such sporting colours."
      ]
    }
  ],
  "word": "half blue"
}