client/securedrop_client/resources/css/source_timestamp.css

#SourceWidget_timestamp {
    font-family: 'Montserrat';
    font-weight: 500;
    font-size: 13px;
    color: #383838;
}

#SourceWidget_timestamp_unread {
    font-family: 'Montserrat';
    font-weight: 600;
    font-size: 13px;
    color: #000;
}

#SourceWidget_timestamp.deleting {
    color: #8e8e92;
    font-style: italic;
}