Cant change any effect custom css for body #eb .t-text--800 !important

Hi

I tried to change my custom css to have white colour instead of grey std color for EB this one

body #eb .t-text--800 {
color: rgba(var(--fd-white-800),1) !important;
}


You have this std: body #eb .t-text--800 {
color: rgba(var(--fd-gray-800),1) !important;
}

But doesnt work and have no effect...

what to do?

cheers!