@shosh,
You can change the background-color of the chart by setting backgroundColor property.
![JavaScript Chart with Background Color](https://canvasjs.com/wp-content/uploads/2021/03/chart-with-background-color.jpeg)
If you like to set gradient or image as the background, you can set backgroundColor property to transparent & set css background property to the chart-container. Please take a look at this JSFiddle for an example.
—
Vishwas R
Team CanvasJS