SharePoint Modern List - Change fill color of column headers

Question

I have a Modern SP list, and the client wants the column headers to be highlighted in yellow, or have a fill color of yellow.

Does anyone know of the JSON I could use to accomplish this?

Answer 1

Unfortunately, it is not possible using SharePoint JSON formatting. This is a known limitation of JSON formatting in SharePoint.

You cannot only format the column headers using JSON formatting in SharePoint online.

Documentation: Use view formatting to customize SharePoint

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You have to format the list view from scratch and build custom headers using JSON. But, it will remove all SharePoint OOTB functionalities.

Reference sample: Custom Header