jellyfin-web/src/components/guide/programs.scss

.newTvProgram {
    background: #38c;
    color: #fff;
}

.liveTvProgram {
    background: #c33;
    color: #fff;
}

.premiereTvProgram {
    background: #ef6c00;
    color: #fff;
}

.repeatTvProgram {
    background: #009688;
    color: #fff;
}