Как вытащить уникальные данные из многомерного массива?

Question

[melishev]

Есть объект:

{
    "id": 1,
    "name": "Тест",
    "popularity": 4,
    "published_at": "2021-07-22T20:18:08.000Z",
    "created_at": "2021-07-11T23:33:52.000Z",
    "updated_at": "2021-07-22T20:19:37.000Z",
    "slug": "test",
    "price": 3000,
    "sale": 2000,
    "variations": [
        {
            "id": 1,
            "color": {
                "id": 1,
                "name": "Черный",
                "slug": "chernyj",
                "published_at": "2021-07-22T20:00:25.000Z",
                "created_at": "2021-07-22T20:00:24.000Z",
                "updated_at": "2021-07-22T20:00:26.000Z"
            },
            "size": {
                "id": 2,
                "name": "M",
                "slug": "m",
                "published_at": "2021-07-22T20:00:01.000Z",
                "created_at": "2021-07-22T19:59:59.000Z",
                "updated_at": "2021-07-22T20:00:01.000Z"
            }
        },
        {
            "id": 2,
            "color": {
                "id": 3,
                "name": "Белый",
                "slug": "belyj",
                "published_at": "2021-07-22T20:00:43.000Z",
                "created_at": "2021-07-22T20:00:42.000Z",
                "updated_at": "2021-07-22T20:00:43.000Z"
            },
            "size": {
                "id": 2,
                "name": "M",
                "slug": "m",
                "published_at": "2021-07-22T20:00:01.000Z",
                "created_at": "2021-07-22T19:59:59.000Z",
                "updated_at": "2021-07-22T20:00:01.000Z"
            }
        }
    ],
}

Как из него получить массив уникальных цветов (объекты COLOR в VARIATIONS)?