Overrides
The Overrides API allows you to customize elements on the chart like panes, scales, series, indicators, drawings, legends, and more.
To override a property, you should specify this property in the overrides parameter of Widget Constructor. The code sample below changes the chart background color and chart style using paneProperties.background and mainSeriesProperties.style.
var widget = window.tvWidget = new TradingView.widget({
    // ...
    overrides: {
        "paneProperties.background": "#020024",
        "mainSeriesProperties.style": 2,
    }
});
If you want to change a property's value on the fly, you can use the applyOverrides method.
tvWidget.applyOverrides({ "mainSeriesProperties.visible": false });
For more information on how to customize different entities using Overrides, refer to the corresponding topics: