"blau" meaning in Interlingua

{
  "head_templates": [
    {
      "args": {
        "1": "ia",
        "2": "adjective"
      },
      "expansion": "blau",
      "name": "head"
    }
  ],
  "lang": "Interlingua",
  "lang_code": "ia",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Interlingua entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 10 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "ia",
          "name": "Blues",
          "orig": "ia:Blues",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "ia",
          "name": "Colors of the rainbow",
          "orig": "ia:Colors of the rainbow",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "blue (color/colour)"
      ],
      "id": "en-blau-ia-adj-aLfLp7X4",
      "links": [
        [
          "blue",
          "blue"
        ]
      ]
    }
  ],
  "word": "blau"
}

{
  "categories": [
    "Pages with 10 entries",
    "Pages with entries",
    "Rhymes:West Frisian/ɔˑu̯",
    "Rhymes:West Frisian/ɔˑu̯/1 syllable",
    "West Frisian adjectives",
    "West Frisian entries with incorrect language header",
    "West Frisian lemmas",
    "West Frisian neuter nouns",
    "West Frisian nouns",
    "West Frisian terms derived from Old Frisian",
    "West Frisian terms derived from Proto-Germanic",
    "West Frisian terms derived from Proto-Indo-European",
    "West Frisian terms derived from Proto-West Germanic",
    "West Frisian terms inherited from Old Frisian",
    "West Frisian terms inherited from Proto-Germanic",
    "West Frisian terms inherited from Proto-Indo-European",
    "West Frisian terms inherited from Proto-West Germanic",
    "fy:Blues",
    "fy:Colors of the rainbow"
  ],
  "head_templates": [
    {
      "args": {
        "1": "ia",
        "2": "adjective"
      },
      "expansion": "blau",
      "name": "head"
    }
  ],
  "lang": "Interlingua",
  "lang_code": "ia",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Interlingua adjectives",
        "Interlingua entries with incorrect language header",
        "Interlingua lemmas",
        "Pages with 10 entries",
        "Pages with entries",
        "ia:Blues",
        "ia:Colors of the rainbow"
      ],
      "glosses": [
        "blue (color/colour)"
      ],
      "links": [
        [
          "blue",
          "blue"
        ]
      ]
    }
  ],
  "word": "blau"
}