Change color of text for lookup columns in SharePoint lists

Change color of text for lookup columns in SharePoint lists

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "a",
  "txtContent": "@currentField.lookupValue",
  "attributes": {
        "target": "_blank",
        "href": {
         "operator": "+",
         "operands": [
            "/sites/REPLACE WITH SITE/Lists/REPLACE WITH LIST/DispForm.aspx?ID=",
            "@currentField.lookupId"
         ]
      }
      },
  "style": {
    "color": "REPLACE WITH COLOR (NAME/HEXADECIMAL CODE)"
  }
}