Get item's color palette

{
    "negg": {
        "darkmuted": {
            "internal_id": 425,
            "population": 3,
            "image": "https://images.neopets.com/items/negg.gif",
            "image_id": "negg",
            "hsv": [
                32,
                40,
                51
            ],
            "rgb": [
                129,
                105,
                78
            ],
            "lab": [
                46,
                6,
                19
            ],
            "type": "darkmuted",
            "hex": "#81694E"
        },
        "darkvibrant": {
            "internal_id": 422,
            "population": 2,
            "image": "https://images.neopets.com/items/negg.gif",
            "image_id": "negg",
            "hsv": [
                23,
                98,
                67
            ],
            "rgb": [
                172,
                68,
                4
            ],
            "lab": [
                43,
                40,
                52
            ],
            "type": "darkvibrant",
            "hex": "#AC4404"
        },
        "lightmuted": {
            "internal_id": 426,
            "population": 15,
            "image": "https://images.neopets.com/items/negg.gif",
            "image_id": "negg",
            "hsv": [
                37,
                11,
                80
            ],
            "rgb": [
                204,
                195,
                181
            ],
            "lab": [
                79,
                1,
                8
            ],
            "type": "lightmuted",
            "hex": "#CCC3B5"
        },
        "lightvibrant": {
            "internal_id": 423,
            "population": 2,
            "image": "https://images.neopets.com/items/negg.gif",
            "image_id": "negg",
            "hsv": [
                29,
                61,
                85
            ],
            "rgb": [
                216,
                148,
                84
            ],
            "lab": [
                67,
                19,
                44
            ],
            "type": "lightvibrant",
            "hex": "#D89454"
        },
        "muted": {
            "internal_id": 424,
            "population": 7,
            "image": "https://images.neopets.com/items/negg.gif",
            "image_id": "negg",
            "hsv": [
                25,
                44,
                66
            ],
            "rgb": [
                168,
                125,
                94
            ],
            "lab": [
                56,
                13,
                23
            ],
            "type": "muted",
            "hex": "#A87D5E"
        },
        "vibrant": {
            "internal_id": 421,
            "population": 58,
            "image": "https://images.neopets.com/items/negg.gif",
            "image_id": "negg",
            "hsv": [
                29,
                98,
                80
            ],
            "rgb": [
                203,
                99,
                4
            ],
            "lab": [
                54,
                37,
                61
            ],
            "type": "vibrant",
            "hex": "#CB6304"
        }
    }
}