Custom background color for cart notices

Hello,
is it possible to define a custom background color for the cart notices generated by the BeRocket plugin, so that they will stand out among the other notices?

This approach for example does not work, as it changes only the text’s background, not the background of the container:

.wc-block-components-notice-banner.is-info .berocket_cart_notice {
background-color: [Your new color];
}

Thank you,
Kind regards.

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