Why does daq.LEDDisplay still have outline? How to get rid of it?

Dash Python
1

Hello, I would like to get rid of the outline of the LED display (not the dbc.Card). Here is the code:

sample_card = dbc.Card([
    dbc.CardHeader("Total Samples"),
    dbc.CardBody([
        daq.LEDDisplay(
            id="sample-led",
            value=x,
            color="#ff4500",
            backgroundColor="#f8f9fa",
            size=30,
        ),
    ])
    ],style={"width": "22rem"},
)

Capture1