Cannot change default video conference background color 'Black' to some other color

I am trying to change the default background color of Jitsi meet iFrame. I am using JAAS service. Below are the options I have tried.

interfaceConfigOverwrite:{
    DEFAULT_BACKGROUND: '#f6f7f9'
}
configOverwrite:{
    backgroundColor: '#f6f7f9'
}

Both of these options are not working. Can you suggest any workaround?

Works here. Show sample code.

@damencho Seems to be working fine now.

Thanks.