Change background of windrose panel

(Grafana 10.0.2, Linux)

I would like to change the background of a compass image in the panel plugin that I installed (operato windrose) from white to black.
I was hoping it would be possible through the panel JSON, but I have not been able to successfully alter it (I’ve just tried adding. Is it possible to do this or would I have to create my own panel since it is not one of the listed panel options?

Here is the panel JSON:
{
“datasource”: {
“type”: “mysql”,
“uid”: “…”
},
“gridPos”: {
“h”: 12,
“w”: 5,
“x”: 17,
“y”: 6
},
“id”: 26,
“options”: {
“colorPalette”: “default”,
“petalsPer90Deg”: 4,
“speedBucketsCount”: 11,
“speedBucketsSize”: 2,
“tooltipDecimalPlaces”: 1,
“windSpeedUnit”: “kt”,
“windroseLabels”: “degree”,
“cardinalLabels”: “cardinal”,
“showLegend”: true,
“doesLegendOverlay”: false
},
“targets”: [
{
“datasource”: {
“type”: “mysql”,
“uid”: “…”
},
“editorMode”: “code”,
“format”: “table”,
“hide”: false,
“rawQuery”: true,
“rawSql”: “SELECT \n wdir AS wind_direction, \n wspd AS wind_speed\nFROM taf_analysis.KINT_analysis \nWHERE wdir <> -1 AND wspd <> 0”,
“refId”: “A”,
“sql”: {
“columns”: [
{
“parameters”: ,
“type”: “function”
}
],
“groupBy”: [
{
“property”: {
“type”: “string”
},
“type”: “groupBy”
}
],
“limit”: 50
}
}
],
“title”: “Historical Wind Rose”,
“transformations”: [
{
“id”: “organize”,
“options”: {
“excludeByName”: {},
“indexByName”: {
“wdir”: 1,
“wspd”: 0
},
“renameByName”: {}
}
}
],
“transparent”: true,
“type”: “operato-windrose-panel”
}