Change the chartArea background color of gvisAnnotationChart

[ghost]

How to change the chartArea background color of gvisAnnotationChart?
I tried this but didn't work

gvisAnnotationChart(
...,
options = list(
    ...,
    chart = list(
      backgroundColor = "#D3D3D3"
    )
  )
)

[mages]

Unfortunately, the Google chart API doesn't have an option to change the background colour: https://developers.google.com/chart/interactive/docs/gallery/annotationchart

[ghost]

I think that it can be done. See this answer

[mages]

It is not officially supported by Google. I suggest you ask the Google developers directly on the Google Chart API Forum: https://groups.google.com/g/google-visualization-api

[ghost]

That's the way https://stackoverflow.com/a/71739376/299077

[mages]

That's great news! I shall include it into the examples of the gvisAnnotationChart help file.