Returning a single element from an array with a join in azure Cosmos SQL DB - azure-cosmosdb

Question

I have a query:
SELECT c.mainColour,t AS colour
FROM c
JOIN t IN c.creatorStyleMainColours
WHERE c.creatorDefaultStyleProfile = "test"
and it returns whole of the array inside the new colour object:
[
{
"colour": {
"mainColour": "black",
"colourPairings": [
"orange",
"silver",
"gold"
]
}
}
]
I need it to just return the main colour values
how do I just select the value of the "mainColour" so its a simple array like ["black","beige","white"] from the document below
I have tried:
SELECT VALUE c.mainColour,t AS colour
FROM c
JOIN t IN c.creatorStyleMainColours
WHERE c.creatorDefaultStyleProfile = "test"
but that returns a syntax error.
Here is the full document:
{
"accountId": "59951c4d-1f0b-483b-a020",
"creatorDefaultStyleProfile": "test",
"creatorDefaultStyleGender": "Female",
"creatorStyleAccountName": "",
"creatorStyleCategory": [
{
"categoryCode": "fashion",
"categoryName": "Fashion",
"categoryMetadata": {
"occasions": [
{
"occasionCode": "casual",
"occasionName": "Casual",
"occasionTypes": [
{
"occasionCode": "out",
"occasionName": "Everyday Wear"
}
]
}
],
"season": [
{
"seasonCode": "spring",
"seasonName": "Spring"
}
]
},
"id": "fashion"
}
],
"creatorStyleDescription": "",
"creatorStyleId": "Classic_Default",
"creatorStyleImages": [
{
"styleImageUrl": "https://4965fa50-6caf-11ed-8082e.png",
"styleImageCategory": "fullsize",
"styleImageResolution": {
"width": 269.25,
"height": 359
},
"styleImagePins": [
{
"itemId": "F243906F37487C78D7EB99880142B370",
"vector": {
"x": 198.125,
"y": 44.33332824707031
}
},
{
"itemId": "9B543E0DC1B05F6E9AFD0A88285AEEF9",
"vector": {
"x": 52.791656494140625,
"y": 46.33332824707031
}
},
{
"itemId": "3E6464FC1F12E3C6E435F751438F1468",
"vector": {
"x": 120.45832824707031,
"y": 320.3333282470703
}
},
{
"itemId": "1CD6065A4C7A0BD66E44DC8A62448534",
"vector": {
"x": 115.45832824707031,
"y": 192
}
}
]
}
],
"creatorStyleItems": [
{
"creatorStyleItemId": "9B543E0DC1B05F6E9AFD0A88285AEEF9",
"ItemType": "Chest",
"creatorStyleItemName": "t-shirt",
"creatorStyleItemImages": [
{
"imageUrl": "https://images/23660493-1-white?$XXL$",
"imageCategory": "thumbnail"
}
]
},
{
"creatorStyleItemId": "F243906F37487C78D7EB99880142B370",
"ItemType": "Chest",
"creatorStyleItemName": "chunky knit cardigan",
"creatorStyleItemImages": [
{
"imageUrl": "https://images/14399002-1-black?$XXL$",
"imageCategory": "thumbnail"
}
]
},
{
"creatorStyleItemId": "1CD6065A4C7A0BD66E44DC8A62448534",
"ItemType": "Leg",
"creatorStyleItemName": " mom jeans",
"creatorStyleItemImages": [
{
"imageUrl": "https://images-blue/202501450-1-denimblack?$XXL$",
"imageCategory": "thumbnail"
}
]
},
{
"creatorStyleItemId": "3E6464FC1F12E3C6E435F751438F1468",
"ItemType": "Feet",
"creatorStyleItemName": "trainers",
"creatorStyleItemImages": [
{
"imageUrl": "https://images./203112454-1-brown?$XXL$",
"imageCategory": "thumbnail"
}
]
}
],
"creatorStyleMainColours": [
{
"mainColour": "black",
"colourPairings": [
"beige",
"grey",
"white"
]
},
{
"mainColour": "beige",
"colourPairings": [
"black",
"grey",
"white"
]
},
{
"mainColour": "white",
"colourPairings": [
"beige",
"grey",
"black"
]
}
],
"creatorStyleMerchantGroup": "test1",
"creatorStyleName": "",
"creatorStyleProfiles": [
{
"id": "",
"profileAccountId": "test1",
"profileId": "test1",
"profileIsDefault": false,
"profileName": "classic",
"profileBiometric": {
"biometricName": "",
"biometricGender": "Female",
"biometricHeight": [
],
"biometricAgeRange": [
],
"biometricHairColour": [
],
"biometricSkinColour": [
],
"biometricBodyShape": [
],
"biometricMeasurement": {
}
},
"profilePersona": {
"personaName": "",
"personaDressSense": [
],
"personaInterests": [
],
"personaStyleIcons": [
],
"personaColours": [
]
}
}
],
"creatorStyleStatus": {
"styleStatusId": "nonpublished",
"styleStatusDescription": ""
},
"id": "classicStyle1",
"_rid": "IW43AJ08x+8BAAAAAAAAAA==",
"_self": "dbs/IW43AA==/colls/IW43AJ08x+8=/docs/IW43AJ08x+8BAAAAAAAAAA==/",
"_etag": "\"97005ae1-0000-1500-0000-638523be0000\"",
"_attachments": "attachments/",
"_ts": 1669669822
}