Capabilities not showing up in format pane

I am trying to add some custom formatting options in the capabilities file I added the following

  "objects": {
        "dataBarColors":{
            "displayName": "Data Bar Colors",
            "properties": {
                "ValueFillColor":{
                    "displayName": "Value Bar Color",
                    "type": {
                        "fill": {
                            "solid": {
                                "color":true
                            }
                        }
                    }
                },
                "GoalFillColor":{
                    "displayName": "Goal Bar Color",
                    "type": {
                        "fill": {
                            "solid": {
                                "color":true
                            }
                        }
                    }
                }
            }
        }
    }

Does anyone know why this is not showing up in the Power BI format pane?

Thanks,

Dan