Data table background color

Dash Python
1

I am not able to change the background color of the data table column when i am using editable feature.
As per the image the column where we are having tick boxes the background color is not changing as black.
Please do help me in this
image

The code used:

html.Div([

            dash_table.DataTable(id="file-list",
            data=files.to_dict('rows'),
            columns=[{'name': i, 'id': i} for i in files.columns],editable=True,
            row_selectable="multi",
            selected_rows=[],style_header={'backgroundColor': 'rgb(30, 30, 30)'},
            style_cell={
                'backgroundColor': 'rgb(50, 50, 50)',
                'color': 'white'
            })
            ])