"тёмно-голубой" meaning in Russo

{
  "categories": [
    {
      "kind": "other",
      "name": "Colori",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Colori RAL",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Colori RAL – russo",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Sostantivi in russo",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Russo",
  "lang_code": "ru",
  "pos": "noun",
  "pos_title": "Sostantivo",
  "senses": [
    {
      "glosses": [
        "blu notte"
      ],
      "id": "it-тёмно-голубой-ru-noun-5BUbNcFS",
      "topics": [
        "color"
      ]
    }
  ],
  "word": "тёмно-голубой"
}

{
  "categories": [
    "Colori",
    "Colori RAL",
    "Colori RAL – russo",
    "Sostantivi in russo"
  ],
  "lang": "Russo",
  "lang_code": "ru",
  "pos": "noun",
  "pos_title": "Sostantivo",
  "senses": [
    {
      "glosses": [
        "blu notte"
      ],
      "topics": [
        "color"
      ]
    }
  ],
  "word": "тёмно-голубой"
}